I believe it to be burn issue but again I am not totally sure on this. Ive seen new growth and it never has appeared like this. Today I noticed the color had mostly returned to the tips however, they have long strings of (?) coming off of them in the water flow. Only the tips I thought were burnt have this. Current levels Mag 1435 Alk 7.5 Cal 460 PH 8.2 up from 8.1 I am raising the kalk dosage to see if this doesnt balance out things. Should I be concerned with a raise in PH due to the higher concentration of kalk? I have very good growth in all of my SPS. My Cyphastrea, Montis, and Acros all show new growth evident. I am happy to admit they are growing very quickly and I can see noticeable difference week to week. If nothing else I am prepared to add a Alk builder to raise the levels or at least steady them.