SuncrestReef Posted October 11, 2019 Share Posted October 11, 2019 I bought this chalice two months ago. For the past month or so, it has been slowly losing color, and now some tissue is starting to recede. I have it placed on a rock at the bottom of my tank, partially under an overhang where 3/4 of the chalice gets light and 1/4 is shaded. PAR in the light is 150, PAR in the shaded area is 35. Water flow is low-medium. Here are my water parameters: Salinity: 1.026 Temp: 78.0 - 78.3 F pH: 8.0 - 8.4 Alk: 8.5 dKH Cal: 420 ppm Mag: 1350 ppm NO3: 4 - 8 ppm PO4: 0.02 - 0.04 ppm I dose BRS 2-part, and my Trident measures Alk/Cal/Mag multiple times per day so I know there have been no spikes. I also target feed Reef Roids twice per week. All of my other corals (SPS, LPS, and softies) look healthy. Could it be too little flow? Too much light? Other ideas? Here are before and after photos: Aug 15, 2019: Oct 11, 2019: Quote Link to comment Share on other sites More sharing options...
goldenbasketreef Posted October 12, 2019 Share Posted October 12, 2019 Keep it in the dark side of the tank till recovered Quote Link to comment Share on other sites More sharing options...
Emerald525 Posted October 12, 2019 Share Posted October 12, 2019 Is it possible it got stung ? I see a Favia in the background and at night the tentacles can come out particularly if you dose with aminos. Quote Link to comment Share on other sites More sharing options...
SuncrestReef Posted October 12, 2019 Author Share Posted October 12, 2019 7 minutes ago, Emerald525 said: Is it possible it got stung ? I see a Favia in the background and at night the tentacles can come out particularly if you dose with aminos. No, that favia is about 6 inches away (looks closer in the photo) and I routinely look at my tank every night with a flashlight (because that's just what I do) and there are no tentacles long enough to come close to the chalice. Plus, this has been a long, slow decline that you wouldn't even notice day to day, but over a period of weeks the color loss has become apparent. I'm taking Rudy's advice to move it to a darker area for a while. Hopefully it bounces back. 1 Quote Link to comment Share on other sites More sharing options...
Optimusprime3605 Posted October 12, 2019 Share Posted October 12, 2019 Be careful crossing over to the 'dark' side, just ask Luke[emoji39]Carry on....Sent from Atlantis 🤙 1 Quote Link to comment Share on other sites More sharing options...
The ReefBox Posted October 12, 2019 Share Posted October 12, 2019 John move it to shade. They like 75-135 par Quote Link to comment Share on other sites More sharing options...
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