Fluval FX4 External FilterThe Fluval FX range of high performance external canister filters now comprises of 3 outstanding models. The FX2, FX4, & FX6's have many exceptional features, designed to make aquarium fishkeeping easier and more convenient than ever. All models include filter media, pipework, and Smart Pump technology. Suitable for use on tropical, coldwater, and marine aquariums.

Supernova Freshwater is the most effective and innovative carbon on the market for freshwater systems

Removes Chlorine And Chloramine

use our Dosage Calculator to help you

or after using a disease treatment

Neutral water that is neither acid nor alkaline is pH 7

All you have to do is add your aquarium water to the test tube and count the drops needed

Aquarium dimensions (LxWxH)81

Repeat dose weekly for 4 weeks when starting a new aquarium or a single dose after each water change

Useful Volume239 L

Nitrite is produced by the beneficial bacteria in the pond and filters as they break down harmful ammonia excreted by fish

Calculate the volume of your aquarium in litres (Length x Width x Depth (in cm)/1

and tap adaptors