ok, here's the deal, i have a 150gal, 75, and a 55 gal up and running, just got another 80 gallon a few hours ago, all these are sa/ca tanks, and i have another 150 and 125 gallon that i don't have room for right now, I have a Bunch of 10 gallon tanks and i want to set one up, I'm looking for a single fish in this tank and that's it, i do weekly and bi-weekly waterchanges already so really not worried about bio-load as much as size, what do you guys/gals think would be cool in this lil tank for life of the fish?