Currently there is a good protein skimmer as well as a 3 stage canister filter returning to a spray bar in oder to generate some additional movement in the water. With these I have found I do not need a seperate powerhead. There is also about 50lbs of live rock as well as a sand bed. So far I have several different gorgonian corals and sea fans as well as kenyan trees and a zoa colony. After the crazy diatom bloom I had a while ago I added 30 astrea snails but diatoms and algae have been under control now for quit some time.
The the 2 captive bred tigers tail I have are still very small. Maybe 2 inches but are doing great. I am looking to add a couple more of a different kind soon. H. Erectus being of warm water too could in theory be kept in the same tank. Correct? Would they have to be of similar size when adding to the tank or could they be larger without having problems? Say a Large Sunburst Mustang.