Tony, I have nothing against sumps and it isn't totally out of the realm yet. But in my particular set up I run a Reverse UG filter. Underneath that thing is a plethora of organisms that have no place to grow in most tanks.
It protects the millions of tiny brittle stars and tube worms that grow all through my gravel due to the water circulation provided by the UG filter. If you don't have a UG filter, the bottom layers of your substrate are pretty baron and stagnant. Baron and stagnant is not a good thing anywhere in a tank. IMO we need oxygen everywhere so things can thrive to grow and feed larger things.
I was at my favorite LFS a few hours ago buying a shrimp and some food. A guy comes up to me and says, "Are you the guy with the very old tank?"
I said, yes thats me. He says, how do you do it, whats the secret? I said I am going to be here for 3 minutes and it would take weeks for me to explain what I do. I forgot to tell him to read my book. :rolleyes:
I don't know exactly what I do to keep the tank healthy and have the fish living forever, but I know what I don't do which I believe is one of the keys. I don't quarantine, I don't use medications, I don't tweek the parameters, I don't use Roaphas, GAC, Prizapro, tree stump remover, red slime remover, antibiotics, carbon, bio pellets, suppliments or just about anything else as I try to run a natural system and I feel the tanks with all the messing with, crash first. :cool: