Thanks for your replies. I'm using the Aqua Forest Mg Plus solution and I use the Red Sea coral pro salt. The corals I have now are: torch coral, BBEB Zoa's, micromussa, goniopora. All corals happy, healthy and full extended. The Goniopora even had a little 'baby'. I guess I'm just bothered that i can't get it above 1300. Thanks for your help. Sent from Singapore Reef Club mobile app