i have read about having a quarantine tank or "sick" bay tank and i am going to set up a 20 gal under my 55 gal tank and is there anything that i should keep in there to keep the nitrite and nitrate and all other levels safe? Should i use the Damsels to break it in like i did my last tank? Or could i put a couple lbs of live rock in it and if so how long would i have to wait? I would assume i would need very good lighting and a power filter but what else? i have always just put any and all fish i have bought directly in the tank! But i will not buy fish from my lfs that has other dead or sick looking fish in the tanks... i guess i have gotten lucky so far but don't want to lose any in the future do to lack of willingness to protect them and my other fish.