Fluval U3 Internal Filter size-3-5kg the all-new FX4 canister filter

the all-new FX4 canister filter bridges the gap between the Fluval 406 and the FX6 canister filters

Activated carbon

This can provide a permanently heated zone within an enclosure which will help create a beneficial air temperature

as a direct result of the inclusion of easily synthesized Astaxanthin

Timing to replace the filter foam varies upon aquarium size and the number of fish and plants

Fluval U3 Internal Filter size-3-5kg the all-new FX4 canister filterOffering outstanding 3 stage filtration, increased water movement and vital aeration, Fluval U Series internal filters are the perfect solution where external filtration is not possible.