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Pond clay

Pond clays based on montmorillonite, and maerl: they bind some of the suspended particles, add minerals to the water and help clear it. Choose by form, montmorillonite content and volume.

How to choose a pond clay?

  • Content: pure clay (Biota Earth, 100% montmorillonite) or blends (Maxi Clay 90%).
  • Form: powder that disperses quickly, or small granules (Clay+).
  • Pack size: from 1 to 25 kg depending on pond volume and how often you add it; regular small doses are better than one large dose.
  • Maerl: a mineral alternative of marine origin (Natura Maërl, Maërl Crystal).

Read: pond clay: how to choose it and clays for ponds. See also improving water quality and our pond bacteria.

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Our experts' choice
Koïs dans un bassin clair, sachet d'Aquipond BactoClay au bord
Aquipond BactoClay Montmorillonite Clay 2kg – Improves Water Quality and Koi Carp Health
€39,95 - €39,95
€39,95
€39,95 - €39,95
€39,95

Aquipond BactoClay - Montmorillonite clay 2 kg for koi ponds

Aquipond BactoClay is an ultra-pure natural clay, rich in montmorillonite (86%), designed to sustainably improve the water quality of koi carp pond...

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€39,95 - €39,95
€39,95
€39,95 - €39,95
€39,95
Maxi Clay 90% 1kg - Clay with excellent solubility (90% Montmorillonite) - Aquatic Science
€19,95 - €19,95
€19,95
€19,95 - €19,95
€19,95

Maxi Clay 90% 1kg - Clay with excellent solubility (90% Montmorillonite) - Aquatic Science

Aquatic Science Maxi-Clay 90% stands out for its excellent solubility, purity (90% Montmorillonite), and exceptional fineness, making it perfectly ...

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€19,95 - €19,95
€19,95
€19,95 - €19,95
€19,95
Maxi Clay 90% 3kg - Clay with excellent solubility (90% Montmorillonite) - Aquatic Science
€41,95 - €41,95
€41,95
€41,95 - €41,95
€41,95

Maxi Clay 90% 3kg - Clay with excellent solubility (90% Montmorillonite) - Aquatic Science

Aquatic Science Maxi-Clay 90% stands out for its excellent solubility, purity (90% Montmorillonite), and exceptional fineness, making it perfectly ...

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€41,95 - €41,95
€41,95
€41,95 - €41,95
€41,95
Maxi Clay 90% 7kg - Clay with excellent solubility (90% Montmorillonite) - Aquatic Science
€83,95 - €83,95
€83,95
€83,95 - €83,95
€83,95

Maxi Clay 90% 7kg - Clay with excellent solubility (90% Montmorillonite) - Aquatic Science

Aquatic Science Maxi-Clay 90% stands out for its excellent solubility, purity (90% Montmorillonite), and exceptional fineness, making it perfectly ...

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€83,95 - €83,95
€83,95
€83,95 - €83,95
€83,95
Bactoplus Ohmizu Clay 2.5 liters - Pond clay from Japan! - Super efficient for clear water – photo 2
Bactoplus Ohmizu Clay 2.5 liters - Pond clay from Japan! - Super efficient for clear water
-19 %
€36,95
€36,95 - €36,95
€36,95
€29,95
€29,95 - €29,95
€29,95

Bactoplus Ohmizu Clay 2.5 liters - Pond clay from Japan! - Super efficient for clear water

Allows you to have clear water in 48 hours Ultra simple to use Active bacteria in contact with water Do you know OHMIZU clay? It is imp...

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€36,95
€36,95 - €36,95
€36,95
€29,95
€29,95 - €29,95
€29,95
-19 %
Biota Earth 1kg - 100% Montmorillonite Clay – photo 2
Biota Earth 1kg - 100% Montmorillonite Clay
-7 %
€15,95
€15,95 - €15,95
€15,95
€14,81
€14,81 - €14,81
€14,81

Biota Earth 1kg - 100% Montmorillonite Clay

Pond clay improves water clarity, color and health of koi and stimulates appetite! Minerals, trace elements necessary for optimal health and devel...

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€15,95
€15,95 - €15,95
€15,95
€14,81
€14,81 - €14,81
€14,81
-7 %
Biota Earth 2kg - 100% Montmorillonite Clay – photo 2
Biota Earth 2kg - 100% Montmorillonite Clay
-22 %
€34,95
€34,95 - €34,95
€34,95
€27,41
€27,41 - €27,41
€27,41

Biota Earth 2kg - 100% Montmorillonite Clay

Pond clay improves water clarity, color and health of koi and stimulates appetite! Minerals, trace elements necessary for optimal health and devel...

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€34,95
€34,95 - €34,95
€34,95
€27,41
€27,41 - €27,41
€27,41
-22 %
Biota Earth 5kg - 100% Montmorillonite Clay – photo 2
Biota Earth 5kg - 100% Montmorillonite Clay
-13 %
€59,95
€59,95 - €59,95
€59,95
€52,11
€52,11 - €52,11
€52,11

Biota Earth 5kg - 100% Montmorillonite Clay

Pond clay improves water clarity, color and health of koi and stimulates appetite! Minerals, trace elements necessary for optimal health and devel...

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€59,95
€59,95 - €59,95
€59,95
€52,11
€52,11 - €52,11
€52,11
-13 %
Biota Earth 10kg - 100% Montmorillonite Clay – photo 2
Biota Earth 10kg - 100% Montmorillonite Clay
-15 %
€94,95
€94,95 - €94,95
€94,95
€81,11
€81,11 - €81,11
€81,11

Biota Earth 10kg - 100% Montmorillonite Clay

Pond clay improves water clarity, color and health of koi and stimulates appetite! Minerals, trace elements necessary for optimal health and devel...

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€94,95
€94,95 - €94,95
€94,95
€81,11
€81,11 - €81,11
€81,11
-15 %
Bactoplus Ohmizu Clay 25litres - Pond clay from Japan! - Super efficient for clear water – photo 2
Bactoplus Ohmizu Clay 25litres - Pond clay from Japan! - Super efficient for clear water
-11 %
€269,95
€269,95 - €269,95
€269,95
€241,11
€241,11 - €241,11
€241,11

Bactoplus Ohmizu Clay 25litres - Pond clay from Japan! - Super efficient for clear water

Do you know OHMIZU clay? It is imported from JAPAN and is ideal for clarifying the water in your pond, based on minerals, zeolite and bacteria. M...

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€269,95
€269,95 - €269,95
€269,95
€241,11
€241,11 - €241,11
€241,11
-11 %
Clay+ 2.5kg - Small clay granules - Air-Aqua - Clay for Pond
€19,95 - €19,95
€19,95
€19,95 - €19,95
€19,95

Clay+ 2.5kg - Small clay granules - Air-Aqua - Clay for Pond

Improves health, appetite, growth, bone structure, skin quality and Koi activity. Does not contain any chemical or unnatural components. Positiv...

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€19,95 - €19,95
€19,95
€19,95 - €19,95
€19,95
Clay+ 25kg - Small clay pellets - Air-Aqua
€114,95 - €114,95
€114,95
€114,95 - €114,95
€114,95

Clay+ 25kg - Small clay pellets - Air-Aqua

Improves health, appetite, growth, bone structure, skin quality and Koi activity. Does not contain any chemical or unnatural components. Positiv...

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€114,95 - €114,95
€114,95
€114,95 - €114,95
€114,95
Bactoplus FOK Mineral Powder 1.5kg - The best-selling water conditioner in Japan!
€79,95 - €79,95
€79,95
€79,95 - €79,95
€79,95

FOK Mineral Powder 1.5kg - The best-selling water conditioner in Japan!

Bactoplus

The best-selling water conditioner in Japan! This blend of minerals and bacteria has several positive effects: Improves water quality and clar...

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€79,95 - €79,95
€79,95
€79,95 - €79,95
€79,95
Natura Maërl Colombo 1000 ml - For 10,000L - Water Treatment
€7,95 - €7,95
€7,95
€7,95 - €7,95
€7,95

Natura Maërl Colombo 1000 ml - For 10,000L - Water Treatment

NATURA MAERL 1000ML COLOMBO - The natural choice for a healthy pond. Colombo's Natura Maerl is a 100% natural product that works deeply to maintain...

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€7,95 - €7,95
€7,95
€7,95 - €7,95
€7,95
velda Vincia Maërl Crystal 1500g – Naturally clarifies water and improves pond balance
€9,49 - €9,49
€9,49
€9,49 - €9,49
€9,49

Vincia Maërl Crystal 1500g – Naturally clarifies water and improves pond balance

velda

For a clear, balanced, and 100% natural pond Vincia Maërl Crystal is a natural water quality corrector, specially designed for pond enthusiasts who...

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€9,49 - €9,49
€9,49
€9,49 - €9,49
€9,49
velda Vincia Maërl Crystal 1500g – Naturally clarifies water and improves pond balance
€13,39 - €13,39
€13,39
€13,39 - €13,39
€13,39

Maërl Crystal 3500g – Naturally clarifies water and improves pond balance

velda

For a clear, balanced, and 100% natural pond Vincia Maërl Crystal is a natural water quality corrector, specially designed for pond enthusiasts who...

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€13,39 - €13,39
€13,39
€13,39 - €13,39
€13,39
Koïs dans un bassin clair, sachet d'Aquipond BactoClay au bord
Aquipond BactoClay Montmorillonite Clay 2kg – Improves Water Quality and Koi Carp Health
€39,95 - €39,95
€39,95
€39,95 - €39,95
€39,95

Aquipond BactoClay - Strengthens your koi and pond from the inside

Aquipond BactoClay is an ultra-pure natural clay, rich in montmorillonite (86%), designed to sustainably improve the water quality of koi carp pond...

View full details
€39,95 - €39,95
€39,95
€39,95 - €39,95
€39,95