Originally Posted by funwiththefish
What exactly is an " air-driven sponge-filter/overflow sort of system"? I don't quite understand the whole "overflow" issue, though I've heard mention of it quite a bit (lots of people mentioning their sumps and pumps and overflow tanks).
I could probably illustrate it far more effectively than describe it....I will draw you a diagram...but not tonight...I am so tired I can barely type.
G. A. Christian Bilou, Herpetologist
Founder/Director, Reptile Rescue Alberta
Past-President, Calgary Aquarium Society