I added two more air pumps and they seem to be moving around the tank more ,but they still arent eating. The little ones I have in the house are tearing it up ,but the bigger ones don't seem to be interested in nothing. The temp is around 83 degrees. There may be chemical residue from the glue used to plumb the sytem. I figured if it was a problem it would have killed them ,but they seem fine accept for the eating issue. I also used some oil in the water pump as per directions for the initial start up and I know all that went into the water, about a tablespoon or so. Should I shut off that tank and move them to the second with fresh water? Not sure what to do, I guess I will have to get a test kit and see what it says.