EcoBio-Stone M
Price range: $30.72 through $57.42
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.
Product details:
Dimensions (in.):
3.75 x 3.75 x 2.125
Tank capacity (gal.):
15–40
Weight (lb.):
1.2