Eheim AKTIV activated carbon 250ml 140g


Eheim AKTIV is ‘activated’ pelleted filter carbon for clarifying and chemically filtering aquarium water. AKTIV is acid washed and activated for automatic water adsorption (active surface area 1200 m2/g). It is great for removing substances such as chlorine, treatment residues and dyes. The water in the aquarium will then turn crystal clear. Its use is particularly important after treating livestock with medications. Can be used in external canister, sump, and some internal filters. Eheim AKTIV can be used in both freshwater and marine aquariums.

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EHEIM filter medias are some of the best in the world. They are highly efficient, developed in their own research laboratories, and made from the best raw materials. They are continually checked and are guaranteed to be free from any harmful substances.

Eheim AKTIV is an adsorptive-type filter media, which extracts and binds harmful substances and pollutants from the water.

These substances include:

treatment and medication residues,
tannins, (leeching from aquarium wood),
organic chemicals,
yellow or brown tints in the water,
heavy metals.
Eheim AKTIV will be effective at retaining these impurities in your filter for up to 4 weeks. After this time, the AKTIV will need replacing. Failure to remove the AKTIV may result in some of what has been removed being leached back into the aquarium.

This is particularly suitable for water purification during the set-up phase of an aquarium. It will ‘clean up’ the water, making it suitable and safe for aquatic inhabitants.

Another time for using AKTIV is if you have added some wood to your aquarium and the water goes a little cloudy. AKTIV will remove this colouration but be patient as the woods can continue to leach the tannins for quite a while.

Eheim AKTIV does not remove ammonia, nitrite, nitrate, or phosphate. Do not use or remove when using the following:

fish disease treatments,
liquid fish food supplements such as vitamin boosters,
catappa or other conditioning leaves,
black water tonic, liquid catappa or other similar water conditioners,
plant foods,
Eheim AKTIV is pH neutral and contains no phosphates so it is perfectly safe and will not alter any of the water parameters in the aquarium.

Inside the filter, Eheim ACTIV should be used for only a short time (4 weeks). It needs to be placed in the layering set up of the filter after the mechanical (i.e. Eheim MECH or MECHpro) and the biological filter media (Eheim SUBSTRATpro). For convenience, it is best placed in the filter inside a net bag.

For best results, use 225g per 200 litres and place some Eheim SYNTH or an Eheim fine filter pad (white coloured) directly after the ACTIV. This will give the water that final ‘polish’ before it re-enters the aquarium.

Eheim ACTIV is suitable for both freshwater and marine aquariums. After the packaging has been opened, any new or unused ACTIV should be kept in an airtight container to keep the product in its best possible condition for future use.

For guidance, Eheim AKTIV 250ml will fill 2x filter modules on an Eheim Aquaball or Biopower filter. Replace or remove after for 4 weeks.

Additional information

Weight 0.17 kg


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