temp stays around 78-80 with lights on and 77-78 with lights off... my ac is also always around 70 degrees sometimes lower...if u scroll up u can see the temp at 78.5 on one of the pictures.....pretty much i just threw the rocks in looked good enough so left it alone lol....I been really busy and only added a randall pistal shrimp that still hiding somewhere....no corals yet =/... peppermint shrimp seem to be missing also the day after the pistal went in. One good thing tho...I can finally see the pods that i added in the refugium with the chaeto......when I first opened the bag all i saw was few small pieces of filter floss nothing moving around....I mean i was shakin and moving it around in the water to see if anything fall out....it was ordered from reefs2go with some snails and stuff....shipped on monday arrived tuesday morning.