Zoas are taking over in our high nutrient tank. This is the tank full of softies that I feed my mysis thaw water. We do skim or it would probably be a disaster otherwise LOL. It does also take time. We have no growth for a few months, then barely noticeable growth, then one day you notice the frag is covered, then you get excited because one zoa has attached to the rock, then you enjoy how you can't see the plug anymore, and finally one day you have zoas growing over everything around them including other corals, the overflow, the glass, and the tubing to your battery -powered airstone! :lmao: Almost 3 years in our case.
Our low nutrient tank they grow very slowly (except the palys I feed directly). That tank is 1.5 years old.