I'm having some trouble with my mixed reef tank. Some of my Sps are bleaching at the tips.(pink lemonade/pink mil/purple monti cup) the growth on the live rock and plugs are great but any new tips seem to bleach out. The only thing I see is my cal is 600 and alk is 10. Any suggestions? About the tank. 6 months old. Moved everything, live rock/ corals(-Sps) from old 90g corner that was running for 3 years.