I have a good example going on in my tank right now. most of the corals have been in there years and have cast off their hitchhikers/been guided out over time for a pretty clean slate as of now. I bought this acro colony and put it in my tank and its receding from the base up about halfway, might lose it. Not a dip candidate, its my tank causing it because my system is treated rather harshly and the others have simply adapted. my feeding consists of freezer burned cyclopeeze prob a year past expiration, that anything accepts it is amazing to me and I don't want to waste the bar.
im only feeding about once a month which is really restricted due to how much time I spend away, and not really wanting to work on the tank. its in cruise control mode, but it adapted to that vs being started that way. This new coral cant cut it. there's no disease or anything at stake.
I think this type of acro needed better/diverse feeding, some roids might have saved it but the tank continues as it is. 99% just fine, Ill know not to try that strain again till im ready to up ante.
I don't even think my current sps which is red monti cap growing crazy eats the burned cyclopeeze...im guessing the N and P it still attains from the reduced food and the pods the food does feed/end up getting eaten somehow. I think im feeding a food web more than corals directly.
I really should order some roti pods that stuff is awesome.