Aqueon - AquaPacs Sludge Remover

Breaks up sludge, debris, and organic waste within the aquarium. Use to remove sludge buildup caused by uneaten food, fish waste, or decaying plant matter. Promotes a well-balanced aquatic environment for happy, thriving fish. One ball treats up to 10G of water. No measuring. No overdosing. No hassle. Safe and easy to use, taking the guesswork out of water care. Safe for all freshwater aquariums