Gonis are my favorite. I have 10 in my tank I love them. Medium to low light. I have 400w MH in a 30" deep tank so i place them no more than about 6" from the bottom. Mine all like pretty heavy flow but not direct flow. My MP60 gives a strong undertow and they really seem to dig it. I don't do any target feeding I broadcast some frozen "coral mix" and I'm sure they eat that. They are very sensitive to the sting of other corals. Mushrooms and zoos especially. Once stung they will recede, but will usually stop once the problem is removed. The rarely grow Bach over the dead spot. These are just observations I've made as I keep several of these. Others may have different findings and opinions.
I keep a green metallic, a red, a blue, a green/pink, a pink with white eye, a green with red eye, a pink with white "petals", a purple metallic, a neon green, and a green alveo with white "petals".