EcoBio-Block Stone for Aquariums, Small - Natural Water Clarifier and Odor Remover, Treats 8 to 16 Gallons senbowe ultrasonic waves and flash lights

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EcoBio-Block Stone for Aquariums, Small - Natural Water Clarifier and Odor Remover, Treats 8 to 16 Gallons senbowe ultrasonic waves and flash lightsBrand: EcoBio Block Color: Coral Features: Volcanic rock containing beneficial bacteria colonies, disperse about every 30 minutes. Clarifies cloudy water and eliminates odors Speeds 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 years