Fluval Spec/Flex/Evo Ammonia Foam Insert Block

Chemical filter media
Removes toxic ammonia to prevent fish loss
Supports a healthy environment when setting up a new aquarium
Recommended for aquariums with higher than average fish stock
Ideal for emergency ammonia spikes
Reduces fish stress
Ideal for use after medicating fish
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