[ReeferNoob4ever]

Haha I know, I guess it was offensive. But I used the least offensive version I could think of. Oh well. That's exactly what I'm thinking. Water changes alone used to keep it in check but it has recently gone as low as 1200. Excuse my ignorance but why does mg go down in the first place? Just part of the coral building process? My LPS and Monti are growing pretty quickly under T5s.