Freshwater Filter Media

39 products

Freshwater aquarium filter media keep the water clear and stable: mechanical (sponges, floss), biological (ceramic rings, sintered glass), and chemical (carbon, resins, zeolite, peat) filtration to manage particulates, nitrogen, and unwanted substances.

How to choose them: always combine mechanical + biological; add chemical only when needed (yellow water, high phosphates, medications, tannins).

Recommended flow order: coarse (sponge 10–20 ppi) → fine (sponge 30–45 ppi/floss) → biological (ceramic rings, sintered glass spheres) → chemical (carbon, resins, zeolite/peat) towards the outlet.

Typical use: sponges/floss catch debris; biological media host bacteria (NH₃→NO₂→NO₃); carbon absorbs colors/odors (also post-treatment); resins target PO₄/NO₃; zeolite helps with ammonia at startup; peat softens/acidifies and releases natural tannins.

Maintenance: rinse sponges and pre-filter in aquarium water; do not wash biological media under the tap; replace floss when saturated; carbon/resins should be replaced/regenerated when due.

Cautions: carbon can absorb fertilizers; peat lowers KH/pH; zeolite should not be used long-term in heavily planted tanks unless necessary. An external pre-filter reduces main filter cleaning.

Tip: set up an easy-to-rinse pre-filter and always maintain a large volume of biological media; add chemical media only when needed and remove it after the objective.

— Advice from the Hobby Pesca & Acquari Team

29% Off

Askoll White Sponge Replacement for Pratiko 100 Filter

€4,80

~~€6,80~~

Replacement white sponge compatible with Askoll Pratiko 100 external filters.Compatibility Old model Pratiko filter Pratiko New Generation filter Pratiko 3.0 Super Silent filter FeaturesFilter...

24% Off

Askoll Phosphate Stop - Anti-Phosphate Treatment for Aquariums 2x50g

€6,80

~~€8,90~~

Askoll Phosphate Stop is a treatment that removes phosphates accumulated in the aquarium, which can cause algae growth.Key features Pack of 2 x 50g sachets Removes accumulated phosphates from the...

27% Off

Askoll Nitrate Stop - Anti-Nitrate Treatment for Aquariums

€14,50

~~€19,90~~

Askoll Nitrate Stop is an anti-nitrate treatment for freshwater aquariums that selectively removes nitrates accumulated in the aquarium, which can be harmful to fish health. Main Features For fre...

62% Off

Askoll Pure Filter Media Kit S - Replacement Filter Media

€4,99

~~€13,00~~

Askoll Pure Filter Media Kit S is the maintenance kit for Askoll Pure S aquariums.Kit contents 1 sponge for mechanical filtration 1 activated carbon cartridge for chemical filtration 1 anti-nitr...

16% Off

Askoll Pure Filter Media Kit M L XL - Replacement Filter Media

€18,50

~~€21,90~~

Askoll Pure Filter Media Kit is what you need to keep your Askoll Pure and Askoll PURE LED M, L or XL aquariums always in optimal condition.Kit contents 1 sponge for mechanical filtration 1 activ...

Askoll Adsorbor Mini - 45g Activated Carbon Bag

€3,90

Askoll Adsorbor Mini quickly eliminates dyes, toxic substances, drug residues, and unpleasant odors from the water, thanks to its extraordinary specific porosity, exceeding 1000 m² per gram.Key Fea...

10% Off

Askoll Adsorbor - 3 x 100g Activated Carbon Bags

€7,90

~~€8,80~~

Askoll Adsorbor quickly eliminates dyes, toxic substances, pharmacological residues, and bad odours from the water thanks to its extraordinary specific porosity, exceeding 1000 m² per gram.Key Feat...

from €2,70

FLO'Synthetic filter flossPET (Polyethylene Terephthalate) fiber: biologically inert and insoluble in water, it does not release substances, removes coarse organic waste, and makes the water clear....

€4,90

PURE ZEOLITE Natural product for chemical filtrationHigh ion exchange capacity helps control ammonia and phosphate levels, combating the growth of many algal forms.Features: Natural mineral in gr...

Sera Siporax Professional 15mm - Filter Medium

from €8,50

Sera Siporax Professional 15mm Maximum Optimization of Biological Filtration The original Sera Siporax Professional is suitable for use in freshwater aquariums, marine aquariums, and even ponds. Re...

Sera Siporax Mini Professional - Filter Material

from €2,50

Sera Siporax Mini Professional Filter Material for Small Aquariums Highly effective filter material specifically for small aquariums, specifically designed for small filters in aquariums with a cap...

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from €11,50

Oceanlife Zeocarb is a mix of carefully selected activated carbons and zeolites that combine the best of both filtration systems. This product is capable of absorbing organic pollutants (includin...

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€19,20

Phosphate Zero is an iron-based resin capable of removing large quantities of phosphates and silicates from water. For animals to thrive, it is important to keep phosphate levels below 0.1 mg/l...

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€12,90

Medium grain zeolite 5-10 mm for aquarium filtration Life Zeo is a special zeolite designed to adsorb compounds such as ammonium (NH4+) and thus reduce the concentration of nitrogenous pollutants (...

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€12,90

Coarse-grain zeolite 8-16 mm for aquarium filtration Life Zeo is a special zeolite designed to adsorb compounds such as ammonium (NH4+) and thus reduce the concentration of nitrogenous pollutants (...

from €12,60

Oceanlife Purite is a new generation synthetic polymer capable of removing nitrites, nitrates, ammonia, and a variety of pollutants from water without affecting beneficial trace elements.A 250 ml p...

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€11,90

KH Test (Carbonate Hardness) for Marine and Freshwater. This test allows for simple and precise measurement of carbonate hardness (KH) in marine water.Knowing the KH level in a marine aquarium ...

from €7,40

Carbon Active is a selected pellet activated carbon for aquarium water filtration. It absorbs toxic, yellowing, medicinal substances, chlorine, and odor-causing compounds from the water, making it ...