I have 125 reef for last 6 years. Im pretty happy with all but slow grow SPS pick 1. Any special requirements for them? All others grow fast even some other SPS but some like pick 1 no at all. Still have a good color. Maybe low ALK around 6 dKH or PH 8.0? Good flow from 4 power heads. MG 1280, Phosfate 0 Nitrate 5. Please let me know. Thanks.