Fluval Spec/FLex/Evo Phosphate Remover Foam Insert Block

Chemical filter media
Traps and controls large and small organic waste and debris
Removes unwanted phosphate
Helps improve water quality
Will not affect pH or hardness
For best results, replace monthly or as required after testing water with your Fluval test kits
Designed specifically for the Fluval Flex, Spec and Evo aquarium series
Convenient 4 x Duo-Pack format