ready for SPS...or am I?

[Myka]

FYI, things like frogspawn and Galaxea that you have mentioned are LPS, not softies. If it has a skeleton it is a hard coral. When a hard coral dies it leaves it's skeleton behind, if a soft coral dies it won't leave a skeleton behind.

Many leathers corals are chemically aggressive releasing toxins into the water to defend their territory. These chemicals can inhibit color and growth of any other coral, but SPS would be more sensitive than LPS or other softies. Using lots of carbon will help to absorb these chemicals, and a reactor will make the carbon more effective.

I wouldn't re-home your Devil's Hand yet, unless it is very large. Try some easy SPS like Montipora digitata (aka branching Monti) or Montipora Capricornis (aka Monti Cap). If you have had them for 6 months, all your water parameters are perfect, and your lighting is sufficient, but the Montis remain brown then I would look at reducing the number of chemically aggressive corals.