I been thinking about making an overflow out of PVC pipe, but I just had a revelation. What about using two of those plastic containers that they use at pet stores to put your fish in before they bag them. You know, turn them back to back, take out the hook and glue them together so they will hang on the back of the tank. Then make some slits in the one so it looks like an overflow, and put a bulkhead in the other and attach a hose to the sump. Oh and get a u-tube to get the water from the overflow to the other side. WHat do you think!!!???
