Great post. I have had problems with SPS, LPS and softies in the past. An ultra clean tank favors SPS. A tank with a little dirtier water favors softies (zoas, leathers, etc). It can be a tough balance especially with leathers and SPS. I don't recommend it. Zoas and LPS along with SPS seem to do fine. if the water is super clean the SPS seem to grow better. If the water is a little bit less super clean the LPS and zoas seem to do better. The SPS, LPS and zoas all seem to still grow but at different rates due to the water quality. Leathers really seem to screw things up IMO and experience as far as SPS. I highly recommend not having leathers and SPS corals together due to the toxins that leather put out.