[bsautococker]

i plan on doing either a 20 or a 29 gal reef tank.. also i wanted to put a couple fish in there that would spawn in my tank. so i was either thinking of doing perculas or the black clownfish (dont know their name, think maybe black perculas). just wondering what kind of filter would be the best for it all, undergravel or something like a rio with a sponge over the intake? and could i do both pairs of clownfish or could i only do 1 pair? i would like to do mushrooms, polyps, and simple things like that with them would that work? thanks