EcoBio-Block Stone for Aquariums, Small - Natural Water Clarifier and Odor Remover, Treats 8 to 16 Gallons

EcoBio-Block Stone for Aquariums, Small - Natural Water Clarifier and Odor Remover, Treats 8 to 16 GallonsVolcanic rock containing beneficial bacteria colonies, disperse about every 30 minutes. Clarifies cloudy water and eliminates odorsSpeeds up nitrogen cycle, with 100% pure bacteria in spores which germinate in early, middle and late stages, only germinating in the presence of organic waste.Reduces need for frequent maintenance by continually replenishing beneficial bacteria for 1 and a half to two yearsSafe for all fish, reptiles, amphibians and other aquatic lifeSimple to use, no mess aquarium care in fresh or salt water. M size treats tanks from 8 to 16 gallons.