[Quinn]

I think the thing that is evidenced here is that there are many factors involved in a successful tank and therefore many ways to be successful. I think the main thing with his tank is the stability of parameters. It's kinda like an old car, you don't fix what breaks because you figure it's part of the natural order of things and as soon as you do, everything will start going wrong. Also I don't know much about undergravel filters but I bet they're a lot less finicky than current filtration methods and therefore he has more room to play there. He's a Vietnam vet and a tradesman and therefore I'm going to conclude he smokes pot which would add a sort of karma variable in there perhaps.