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volcano bubbler

  1. Freshwater and Tropical Fish
    I have new bubbler in my 90 gallon tank. The kind that comes wth volacno/skull is what I have. It says it is for 18 inches deep tanks or less. 1. Mine is deeper and not as strong as I would like. 2. I cant find where they make a stronger all in one system 3. I have no check valve on this...