Coral Question

[Glennrf38]

Looking for some suggestions/answers. I've had my tank now for about 2 years and don't seem to have much luck with a couple of things.

1) Can't seem to get any coral besides zenia and "gsp types" to grow. For example, I bought a three head frogspawn 2 months ago and it is already down to two heads. The two that are left seem to be very "wilted".

2) Can't get chaeto to grow either. I've had the same ball in my sump for a year and it doesn't grow. I'm thinking it might be a fake plant .

Water parameters all seem to be good. Lighting is a corallife 150W MH/PC. Good flow....... umm any suggestions?