Im pretty sure salt water is pretty much the same as freshwater as far as bacteria goes and I had xlose to 30 cichlids in a 75 gallon tank back in the day. Just as long as you have plenty of filtration and oxigenation do water changes you should be good. I have a 100 rimless and I have 1 yellow tang, 1 sailfin tang, 1 yellow wrasse, 2 naked clowns, 1 Hippo tang, 1 midas blenny, 2 square anthias, 1 strawberry psuedo, 1 blue goby along with corals, snails, shrimp and a longspine urchin. Thats 11 fish and I have no issues with water quality. I do bi weekly water changes and check parameters regularly. For filtration I use a sump with filter media and chaeto algae in a fuge. I dont use any type of reactor or skimmer. I will probably start to use a skimmer pretty soon though.