Hey all! So I have a question and ill post my levels before I ask. Alk 8.7 cal 455 mag 1460 n03 22 po4 0... so my dilemma is obviously high nitrates and low phosphates.. icp came back. 02 on phosphates but I have been dosing .4 ml of phosphates to get detectable levels. It will jump to .02 for a day then fall to zero over the next 3-4 days.... I've only done this 3 times now and today noticed a chalice with tissue recession about a quarter inch in diameter. I run a full sps system and was loosing vivid color in my sps so very cautiously trying to get po4 up to detectable ranges.... im leary because I've got about 30 grand in sps in this tank and dont want to chase numbers but want the best color I can get out of my sps. I've recently made some changes to get my nitrates down by using water changes another gallon a day feeding less and dosing less aminos. I dos heavy aminos and use nopox to counteract. This is an existing system I tied into with a new build. Added alot of tangs and did pretty much at once for aggresi9n reasons so I was feeding heavy which spiked nutrients. I dont know if the po4 going up and down from .02 to zero rapidly has caused the chalice to get sick or what but in looking for some input. I apologize this post is a little jumbled rarely ask for help but sure could use it. I can provide more info if I'm missing something Tia!