The tempreture is between 18 and 20, kept there by means of a chiller. My filtration consists of overflow corner chamber with floss (which im told is a no no, so maybe must come out) and a nylon bag of sea shells found on beaches also in this chamber. This discharges into my sump with yet more floss and hair curlers in the first chamber of the sump. Second chamber houses 2 nylon bags of crushed coral. Third and last chamber has my skimmer and return pump in. I do monthly water changes of about 20 percent.
What is really great about this tank is being able to catch your own specimens and when they get to big and or bossy its back to the ocean to be replaced by smaller ones. We can spend the whole day pottering around rockpools looking for likely tankmates. I have had mullet, zebras, musselcracker, black tails, orange tails and stumpnose in the tank at various stages. At the moment I have zebra, mullet and two tone fingerfins in. The fingerfins don't seem to do well even though I have read elsewhere that they thrive in captivity aquariums. I'll take a picture and post.