Fluval U4 - Poly/carbon Cartridge 2 Aqua forest then you would add (200x10)/80=25

then you would add (200x10)/80=25 g into the top-off water

It feels strong and durable - perfect for work inside your aquarium

no cutting and no holes in your wall or stand – have your light mounted in minutes

Use in a canister filter

Fluval U4 - Poly/carbon Cartridge 2 Aqua forest then you would add (200x10)/80=25Offering outstanding 3 stage filtration, increased water movement and vital aeration, Fluvals U Series internal filters are the perfect solution where external filtration is not possible . This Fluval Poly Carbon Cartridge has two unique filtering sides that combine to provide thorough and effective chemical filtration, the crucial second stage in the filtration process. The polyester filter pad side filters out fine debris and contaminants, while the