TIDY TURTLE™ keeps turtle bowls, tanks and aquariums clean by using naturally occuring beneficial bacteria to remove sludge from the gravel substrate. Odors caused by foul water are greatly reduced. This formula contains specifically developed sludge removing bacteria used to remove organic debris from aquarium gravel, filters, tubing, etc. TIDY TURTLE contains only naturally occuring or beneficial bacteria and augments beneficial microbes already present in the turtle's environment. As well as eliminating unsightly sludge from the aquarium, these bacteria will also reduce odors that are produced as a result of organic decay.