Oh oh..... if it's that bad, then how can I get rid of them?
Went to Henry that day to pick up a PO4 and he recommended me a fish (not sure the name but it looks quite ugly.....) to add into the tank. He said the fish will eat them up but till now I've not seen it eating the apitasia. In fact, it is pinching on my corals........
By the way, my place is besides Queenstown MRT station.