Thank you ScorpiNO for the input. I really want to go real slow with this tank but it is not mine :( My brother in law is the owner and he has me in charge of putting things together. He is in a rush, but I am working on slowing him down!! I am pushing him to get a sump and skimmer so we can add more fish. Only time will tell!

I do plan on putting in some micro algae, I really like the stuff that looks like little shaving brushes, I believe they are called Penicillus?

All this being said IF this tank was to go only biofiltration what fish would you put in it?