in a few weeks i will be setting up a new 75 with a 30 gallon sump/refugium and top shelf trinketry. my old setup is a beginers mistake cheapo 55 with the finest equipment that $2.64 can buy. no sump, seaclone skimmer, magnum 350 canister filter for carbon. substrait is 50%cc 50% good sand full of life 5"deep. will be stealing the liverock for the new tank. could i use this as a non reef safe FO tank or is it too small/crappy. i was thinking a predator tank would be cool. if not predator i have always wanted a spiny puffer or a cowfish but they get big don't they. i could sell the tank but would much rather use it for something cool. any ideas?