Kordon/Oasis (Novalek) AKD39666 Freshwater Tidy Tank for Aquarium, 16-Ounce
Tidy tank is an organic debris control for freshwater that improves water quality naturally, reduces odors and extends the useful life of filter materials. Tidy tank contains only naturally occurring beneficial bacteria that breaks down organic debris in filters and gravel deep down into the substrate. Does not affect ph.