Hey Phil, I think you need a UGF in that tank.
What is a UGF Paul?
Ah youngons. If it were not for undergravel filters there would be no salt water or fresh water hobby. It was the only thing available to purify the water. Our tanks were essentially sterile with no place for bacteria to grow. We had no live rock and we bleached the dead coral skeletons we used as decoration so we needed UG filters under the gravel to have a place to grow bacteria.
An UG filter allows water to percolate through the gravel supplying the bacteria a place to grow while bathed in oxygen.
In saltwater regular UG filters had problems as we found out in about a year. All of the detritus from those old tanks would clog the spaces in the gravel and eventually it would clog and be useless forcing us to remove everything from the tank and clean the gravel.
I found a way to make the thing run forever with almost no maintenannce.
Yes he did. How do you think he saved all of those fish from the flood?