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EcoBio-Stone M for mid-size aquariums is a volcanic rock and cement block containing beneficial bacteria spores Extra blocks may be necessary depending on variations in the condition of water, temperature and amount of fish.
3.75 x 3.75 x 2.125
Tank capacity (gal.):
Easy to use in just 3 simple steps
Makes cloudy fish tanks clear and healthy
Minimize aquarium maintenance: Lasts for up to 2 years
Removes smelly tank odors
Safe for all fish, shrimp, frogs, and turtles
Speeds up the nitrogen cycle
EcoBio-Stone M makes cloudy fish tanks clear and healthy with special beneficial bacteria which multiply when immersed in water.