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Water conditioners for freshwater aquariums

Preparing the water is essential when setting up an aquarium and during water changes. Our aquarium water conditioners include JBL Biotopol, Sera Aquatan and Easy-Life AquaMaker, with different formulas and packaging.

Why use a water conditioner?

Depending on the formula, a conditioner can help neutralize chlorine, chloramines or certain heavy metals present in tap water. Check the substances actually covered by the chosen product and the manufacturer's recommendations.

How to choose the right conditioner?

  • Aquarium type: freshwater, saltwater, goldfish, shrimp or other sensitive species according to the instructions.
  • Usage: preparing new water or adding directly to the aquarium, depending on the product.
  • Concentration: compare the actual dosages, not just the price of the bottle.
  • Compatibility: do not combine products without checking their instructions and precautions.

Properly preparing a water change

Measure the volume of water to be replaced, check its temperature and use the conditioner at the recommended dosage. Products do not all have the same concentration; avoid copying the dosage of another brand.

Frequently asked questions

Does a conditioner replace the biological filter?

No. It prepares the water according to its formulation, but does not replace the biological cycle or the nitrite and ammonia tests.

Can the same product be used for shrimp?

Only if the manufacturer indicates compatibility suitable for the invertebrates concerned.

To complete the maintenance, discover our aquarium water tests and our aquarium bacteria.

Filters

Original price €5,43 - Original price €5,43
Original price
€5,43
€5,43 - €5,43
Current price €5,43

JBL Biotopol 100ml - Water conditioner for freshwater aquarium

Nature at home: Safety for fish and plants Fish and invertebrates should feel just as good in the aquarium as they do in nature. Prepare the...

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Original price €5,43 - Original price €5,43
Original price
€5,43
€5,43 - €5,43
Current price €5,43
Original price €10,90 - Original price €10,90
Original price
€10,90
€10,90 - €10,90
Current price €10,90

JBL Biotopol 250ml - Water conditioner for freshwater aquarium

Nature at home: Safety for fish and plants Fish and invertebrates should feel just as good in the aquarium as they do in nature. Prepare the ...

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Original price €10,90 - Original price €10,90
Original price
€10,90
€10,90 - €10,90
Current price €10,90
Original price €20,95
Original price €20,95 - Original price €20,95
Original price €20,95
Current price €17,66
€17,66 - €17,66
Current price €17,66

JBL Biotopol 500ml - Water conditioners

Quickly transforms tap water into a natural biotope for aquarium inhabitants. Ref.: 2300381 EAN code: 4014162013873 Content: 500ml Volume ...

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Original price €20,95
Original price €20,95 - Original price €20,95
Original price €20,95
Current price €17,66
€17,66 - €17,66
Current price €17,66
-16 %
Original price €76,82 - Original price €76,82
Original price
€76,82
€76,82 - €76,82
Current price €76,82

JBL Biotopol 5l - Water conditioner for freshwater aquariums

Nature at home: Safety for fish and plants Fish and invertebrates should feel just as good in the aquarium as they do in nature. Prepare the...

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Original price €76,82 - Original price €76,82
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€76,82
€76,82 - €76,82
Current price €76,82
Original price €5,48 - Original price €5,48
Original price
€5,48
€5,48 - €5,48
Current price €5,48

JBL Biotopol C 100ml - Water conditioner for crustaceans and shrimps

Nature at home: Safety for fish, invertebrates and plants Fish and invertebrates should feel just as good in the aquarium as they do in nature....

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Original price €5,48 - Original price €5,48
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€5,48
€5,48 - €5,48
Current price €5,48
Original price €7,56 - Original price €7,56
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€7,56
€7,56 - €7,56
Current price €7,56

JBL Biotopol T 50ml - Water conditioner for terrarium

Biotopol T water conditioner transforms tap water into bathing water physiologically suitable for reptiles and amphibians. It removes aggressive...

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Original price €7,56 - Original price €7,56
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€7,56
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Original price €5,55 - Original price €5,55
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€5,55
€5,55 - €5,55
Current price €5,55

JBL Biotopol R 100ml - Water conditioner for goldfish

Nature at home Safety for fish and plants Fish and invertebrates should feel just as good in the aquarium as they do in nature. Prepare the a...

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Original price €5,55 - Original price €5,55
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€5,55
€5,55 - €5,55
Current price €5,55
Original price €10,35 - Original price €10,35
Original price
€10,35
€10,35 - €10,35
Current price €10,35

JBL Biotopol R 250ml - Water conditioner for goldfish

Nature at home Safety for fish and plants Fish and invertebrates should feel just as good in the aquarium as they do in nature. Prepare the aqu...

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Original price €10,35 - Original price €10,35
Original price
€10,35
€10,35 - €10,35
Current price €10,35
Original price €2,93
Original price €2,93 - Original price €2,93
Original price €2,93
Current price €2,34
€2,34 - €2,34
Current price €2,34

Sera Aquatan 50 ml - Toxin Remover

Eliminates excess chlorine and chloramine. Binds toxic heavy metals (copper, zinc, lead). Prevents water pollution by ammonia. Does not af...

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Original price €2,93
Original price €2,93 - Original price €2,93
Original price €2,93
Current price €2,34
€2,34 - €2,34
Current price €2,34
-20 %
Original price €6,25 - Original price €6,25
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€6,25
€6,25 - €6,25
Current price €6,25

Sera Aquatan 100 ml - Toxin remover

For clean, crystal-clear, fish-appropriate aquarium water. Eliminates chlorine and chloramine instantly Binds toxic heavy metals, such as...

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Original price €6,25 - Original price €6,25
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€6,25
€6,25 - €6,25
Current price €6,25
Original price €5,13 - Original price €5,13
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€5,13
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Current price €5,13

Sera Aquatan 100 ml - Toxin remover

Eliminates excess chlorine and chloramine. Binds toxic heavy metals (copper, zinc, lead). Prevents water pollution from ammonia. No influe...

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Original price €5,13 - Original price €5,13
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€5,13
€5,13 - €5,13
Current price €5,13
Original price €4,50 - Original price €4,50
Original price
€4,50
€4,50 - €4,50
Current price €4,50

Sera Reptil Aquatan - Water conditioner for terrariums 100 ml

This volume treats 500 liters of water. Water suitable for turtles, frogs and amphibians. It is important to properly analyze the pond wate...

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Original price €4,50 - Original price €4,50
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€4,50
€4,50 - €4,50
Current price €4,50
Original price €9,44 - Original price €9,44
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€9,44
€9,44 - €9,44
Current price €9,44

Sera Aquatan 250 ml (Toxin remover)

Eliminates excess chlorine and chloramine. Binds toxic heavy metals (copper, zinc, lead). Prevents water pollution by ammonia. Does not aff...

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Original price €9,44 - Original price €9,44
Original price
€9,44
€9,44 - €9,44
Current price €9,44
Original price €11,54
Original price €11,54 - Original price €11,54
Original price €11,54
Current price €9,23
€9,23 - €9,23
Current price €9,23

Sera Aquatan 500 ml - Toxin remover

Eliminates excess chlorine and chloramine. Binds toxic heavy metals (copper, zinc, lead). Prevents water pollution from ammonia. No influe...

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Original price €11,54
Original price €11,54 - Original price €11,54
Original price €11,54
Current price €9,23
€9,23 - €9,23
Current price €9,23
-20 %
Original price €52,45
Original price €52,45 - Original price €52,45
Original price €52,45
Current price €31,49
€31,49 - €31,49
Current price €31,49

Sera Aquatan 2,500 ml - Toxin remover

Eliminates excess chlorine and chloramine. Binds toxic heavy metals (copper, zinc, lead). Prevents water pollution from ammonia. No influence...

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Original price €52,45
Original price €52,45 - Original price €52,45
Original price €52,45
Current price €31,49
€31,49 - €31,49
Current price €31,49
-40 %
Original price €52,49
Original price €52,49 - Original price €52,49
Original price €52,49
Current price €41,99
€41,99 - €41,99
Current price €41,99

Sera Aquatan 5,000 ml - Toxin remover

Eliminates excess chlorine and chloramine. Binds toxic heavy metals (copper, zinc, lead). Prevents water pollution caused by ammonia. No i...

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Original price €52,49
Original price €52,49 - Original price €52,49
Original price €52,49
Current price €41,99
€41,99 - €41,99
Current price €41,99
-20 %
Original price €25,62
Original price €25,62 - Original price €25,62
Original price €25,62
Current price €19,22
€19,22 - €19,22
Current price €19,22

AQUAMAKER 1000ML EASY LIFE - Water conditioner

Easy-Life

Easy-Life AquaMaker 1 L: preparing the water for your aquariumEasy-Life AquaMaker is a conditioner designed to prepare tap water for use in freshwa...

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Original price €25,62
Original price €25,62 - Original price €25,62
Original price €25,62
Current price €19,22
€19,22 - €19,22
Current price €19,22
-25 %
Original price €5,46
Original price €5,46 - Original price €5,46
Original price €5,46
Current price €4,10
€4,10 - €4,10
Current price €4,10

AQUAMAKER 100ML EASY LIFE - Water conditioner

Easy-Life

Easy-Life AquaMaker 100 ml – Prepare aquarium waterAquaMaker Easy-Life is a conditioner designed to prepare tap water for aquarium use, notably by ...

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Original price €5,46
Original price €5,46 - Original price €5,46
Original price €5,46
Current price €4,10
€4,10 - €4,10
Current price €4,10
-25 %
Original price €9,66
Original price €9,66 - Original price €9,66
Original price €9,66
Current price €7,25
€7,25 - €7,25
Current price €7,25

AQUAMAKER 250ML EASY LIFE - water conditioner

Easy-Life

AQUAMAKER 250ml EASY LIFE It makes tap water ready for use in all freshwater and saltwater aquariums. It is suitable for reef aquariums and gard...

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Original price €9,66
Original price €9,66 - Original price €9,66
Original price €9,66
Current price €7,25
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Current price €7,25
-25 %
Original price €117,60
Original price €117,60 - Original price €117,60
Original price €117,60
Current price €88,20
€88,20 - €88,20
Current price €88,20

AQUAMAKER 5000ML EASY LIFE - Water conditioner

Easy-Life

Easy-Life AquaMaker 5 L – Large-Size Water ConditionerThe Easy-Life AquaMaker 5 litres is the large-size packaging of the conditioner intended for ...

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Original price €117,60
Original price €117,60 - Original price €117,60
Original price €117,60
Current price €88,20
€88,20 - €88,20
Current price €88,20
-25 %
Original price €15,54
Original price €15,54 - Original price €15,54
Original price €15,54
Current price €11,66
€11,66 - €11,66
Current price €11,66

AquaMaker 500 ml Easy Life - Water Conditioner

Easy-Life

Easy-Life AquaMaker 500 ml: Water Conditioner for Water ChangesThe Easy-Life AquaMaker 500 ml is used to prepare tap water before using it in a fre...

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Original price €15,54
Original price €15,54 - Original price €15,54
Original price €15,54
Current price €11,66
€11,66 - €11,66
Current price €11,66
-25 %
Original price €28,34 - Original price €28,34
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€28,34
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Current price €28,34

Sera Bio Nitrivec - 0.5 L

Premium liquid filter media Biologically decomposes food remains, ammonia and nitrites Provides beneficial cleaning bacteria with a colonization...

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Original price €28,34 - Original price €28,34
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€28,34
€28,34 - €28,34
Current price €28,34
Original price €17,94 - Original price €17,94
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€17,94
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Current price €17,94

Sera mineral salt - Mineral supplement - 270 g

Complete and versatile mineral preparation Improves reproductive capacity Strengthens the immune system For perfect scales and a strong skeleto...

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Original price €17,94 - Original price €17,94
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€17,94
€17,94 - €17,94
Current price €17,94
Original price €12,38 - Original price €12,38
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€12,38
€12,38 - €12,38
Current price €12,38

Sera Aquatan - Water Conditioner - 500 ml

Water conditioner for fish-friendly and mineral-rich water Eliminates chlorine and chloramine Binds heavy metals With minerals With every wa...

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Original price €12,38 - Original price €12,38
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€12,38
€12,38 - €12,38
Current price €12,38
Original price €11,85 - Original price €11,85
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€11,85
€11,85 - €11,85
Current price €11,85

Sera Nitrite-minus - removes nitrites

Immediate aid against nitrite eliminates up to 1.5 mg/l of nitrite per dosage prevents a nitrite spike During the start-up phase of a new aqu...

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Original price €11,85 - Original price €11,85
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€11,85
€11,85 - €11,85
Current price €11,85
Original price €11,22 - Original price €11,22
Original price
€11,22
€11,22 - €11,22
Current price €11,22

Sera Siporax Bio Active Professional

The revolution in water conditioning This extraordinary "dry conditioner" combines biological filtration, which has a stabilizing effect, with the ...

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Original price €11,22 - Original price €11,22
Original price
€11,22
€11,22 - €11,22
Current price €11,22
Original price €8,91 - Original price €8,91
Original price
€8,91
€8,91 - €8,91
Current price €8,91

Sera Aquatan - Water conditioner

Water conditioner for fish-safe and mineral-rich water Removes chlorine and chloramine Binds heavy metals With minerals With every water cha...

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Original price €8,91 - Original price €8,91
Original price
€8,91
€8,91 - €8,91
Current price €8,91
Original price €8,70 - Original price €8,70
Original price
€8,70
€8,70 - €8,70
Current price €8,70

Sera Bio Nitrivec - Water conditioner - 100 ml

First-class liquid filter medium Biologically breaks down food residues, ammonium, and nitrites Provides a colonization surface for beneficial c...

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Original price €8,70 - Original price €8,70
Original price
€8,70
€8,70 - €8,70
Current price €8,70
Original price €8,70 - Original price €8,70
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€8,70
€8,70 - €8,70
Current price €8,70

Sera glass clear M - Magnet for aquarium glass

This magnet makes it easy to clean aquarium glass. The cleaning surface of the inner part takes care of removing algae deposits. The surface of the...

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Original price €8,70 - Original price €8,70
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€8,70
€8,70 - €8,70
Current price €8,70
Original price €8,07 - Original price €8,07
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€8,07
€8,07 - €8,07
Current price €8,07

Sera filter biostart - Water conditioner - 50 ml

Bacteria and enzymes at the starting blocks Fish waste, leftover food, and dead plants quickly form a layer of sludge on the aquarium bottom. The b...

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Original price €8,07 - Original price €8,07
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€8,07
€8,07 - €8,07
Current price €8,07
Original price €7,65 - Original price €7,65
Original price
€7,65
€7,65 - €7,65
Current price €7,65

Sera super peat - Water conditioner

Natural black water like in the tropics Lastingly stabilizes the pH at a slightly acidic level Carefully reduces water hardness Long-term relea...

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Original price €7,65 - Original price €7,65
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€7,65
€7,65 - €7,65
Current price €7,65
Original price €6,08 - Original price €6,08
Original price
€6,08
€6,08 - €6,08
Current price €6,08

Sera toxivec - eliminates harmful substances - 100 ml

First aid in the aquarium Immediately eliminates toxic ammonia and nitrites Binds harmful heavy metals, such as lead and copper Eliminates chlo...

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Original price €6,08 - Original price €6,08
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€6,08
€6,08 - €6,08
Current price €6,08
Original price €5,55 - Original price €5,55
Original price
€5,55
€5,55 - €5,55
Current price €5,55

Sera Alder Bugs - Water Conditioner

Alder cones for a natural reduction of the pH value sera Alder Cones naturally prevent fungal diseases and spawn mold. Furthermore, they promote na...

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Original price €5,55 - Original price €5,55
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€5,55
€5,55 - €5,55
Current price €5,55
Original price €5,45 - Original price €5,45
Original price
€5,45
€5,45 - €5,45
Current price €5,45

Sera Goldy Aquatan - Water conditioner

Water conditioner for goldfish-appropriate, mineral-rich water instantly removes chlorine and chloramines binds heavy metals with minerals s...

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Original price €5,45 - Original price €5,45
Original price
€5,45
€5,45 - €5,45
Current price €5,45
Original price €3,66 - Original price €3,66
Original price
€3,66
€3,66 - €3,66
Current price €3,66

Sera Siporax Bio Active Professional - 35 g

 The revolution in water conditioning This extraordinary "dry conditioner" combines biological filtration with a stabilizing effect and the efficie...

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Original price €3,66 - Original price €3,66
Original price
€3,66
€3,66 - €3,66
Current price €3,66
Original price €7,56 - Original price €7,56
Original price
€7,56
€7,56 - €7,56
Current price €7,56

JBL Clearol 100ml - Water conditioner for crystal clear water in freshwater aquariums

Nature at home - Safety for fish and plants The fish should feel just as good in the aquarium as they do in nature. Clean aquarium water - optimal...

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Original price €7,56 - Original price €7,56
Original price
€7,56
€7,56 - €7,56
Current price €7,56
Original price €15,37 - Original price €15,37
Original price
€15,37
€15,37 - €15,37
Current price €15,37

JBL Clearol 250ml - Water conditioner for crystal clear water in freshwater aquariums

Nature at home - Safety for fish and plants The fish should feel just as good in the aquarium as they do in nature. Clean aquarium water - optimal...

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Original price €15,37 - Original price €15,37
Original price
€15,37
€15,37 - €15,37
Current price €15,37
Original price €31,30 - Original price €31,30
Original price
€31,30
€31,30 - €31,30
Current price €31,30

JBL Clearol 500ml - Water conditioner for crystal clear water in freshwater aquariums

Nature at home - Safety for fish and plants The fish should feel just as good in the aquarium as they do in nature. Clean aquarium water - optimal...

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Original price €31,30 - Original price €31,30
Original price
€31,30
€31,30 - €31,30
Current price €31,30
Original price €5,48 - Original price €5,48
Original price
€5,48
€5,48 - €5,48
Current price €5,48

JBL Clynol 100ml - Aquarium water conditioner

Nature at home Fish and invertebrates should feel just as good in the aquarium as they do in nature. Tiny natural minerals distribute themselves...

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Original price €5,48 - Original price €5,48
Original price
€5,48
€5,48 - €5,48
Current price €5,48
Original price €9,88 - Original price €9,88
Original price
€9,88
€9,88 - €9,88
Current price €9,88

JBL Clynol 250ml - Aquarium water conditioner

Nature at home Fish and invertebrates should feel just as good in the aquarium as they do in nature. Tiny natural minerals disperse in the water ...

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Original price €9,88 - Original price €9,88
Original price
€9,88
€9,88 - €9,88
Current price €9,88
Original price €16,83 - Original price €16,83
Original price
€16,83
€16,83 - €16,83
Current price €16,83

JBL Clynol 500ml - Aquarium water conditioner

Nature at home Fish and invertebrates should feel just as good in the aquarium as they do in nature. Tiny natural minerals distribute themselves ...

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Original price €16,83 - Original price €16,83
Original price
€16,83
€16,83 - €16,83
Current price €16,83
Original price €8,35 - Original price €8,35
Original price
€8,35
€8,35 - €8,35
Current price €8,35

LessStress Water purifiers - 250 ml

Oase

Tap water may contain pollutants and should always be treated to ensure safe use in the aquarium. Water purifiers reliably and scientifically neut...

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Original price €8,35 - Original price €8,35
Original price
€8,35
€8,35 - €8,35
Current price €8,35
Original price €12,55 - Original price €12,55
Original price
€12,55
€12,55 - €12,55
Current price €12,55

LessStress Water purifiers - 500 ml

Oase

Tap water may contain pollutants and should always be treated to ensure safe use in the aquarium. Water purifiers reliably and scientifically neut...

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Original price €12,55 - Original price €12,55
Original price
€12,55
€12,55 - €12,55
Current price €12,55
Original price €20,95 - Original price €20,95
Original price
€20,95
€20,95 - €20,95
Current price €20,95

LessStress Water purifiers - 1L

Oase

Tap water may contain pollutants and should always be treated to ensure safe use in the aquarium. Water purifiers reliably and scientifically neu...

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Original price €20,95 - Original price €20,95
Original price
€20,95
€20,95 - €20,95
Current price €20,95
Original price €73,45 - Original price €73,45
Original price
€73,45
€73,45 - €73,45
Current price €73,45

LessStress Water purifiers - 5L

Oase

Tap water may contain pollutants and should always be treated to ensure safe use in the aquarium. Water purifiers reliably and scientifically neut...

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Original price €73,45 - Original price €73,45
Original price
€73,45
€73,45 - €73,45
Current price €73,45
Original price €10,45 - Original price €10,45
Original price
€10,45
€10,45 - €10,45
Current price €10,45

AquaStable Water Optimizer - 50g

Oase

Within minutes, AquaStable stabilizes key aquarium water levels: pH and carbonate hardness. Ammonia and nitrite poisoning are neutralized, result...

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Original price €10,45 - Original price €10,45
Original price
€10,45
€10,45 - €10,45
Current price €10,45
Original price €15,70 - Original price €15,70
Original price
€15,70
€15,70 - €15,70
Current price €15,70

AquaStable Water Optimizer - 100g

Oase

Within minutes, AquaStable stabilizes key aquarium water levels: pH and carbonate hardness. Ammonia and nitrite poisoning are neutralized, result...

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Original price €15,70 - Original price €15,70
Original price
€15,70
€15,70 - €15,70
Current price €15,70
Original price €26,20 - Original price €26,20
Original price
€26,20
€26,20 - €26,20
Current price €26,20

AquaStable Water Optimizer - 500g

Oase

Within minutes, AquaStable stabilizes key aquarium water levels: pH and carbonate hardness. Ammonia and nitrite poisoning are neutralized, result...

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Original price €26,20 - Original price €26,20
Original price
€26,20
€26,20 - €26,20
Current price €26,20