Thought I'd wait this one out, but I'm getting worried now and feeling like my assumption isn't the right one...
Due to me not having a ton of time and being lazy/forgetful, I didn't check my parameters for a few weeks. I've been slowly adjusting my dosing pump according to the consumption for the last 2 months. Turns out my alk has dropped from 8.3 to 7.3 in that 3 week timespan of not testing. Calc and magnesium have dropped a bit as well, but nothing dramatic. I tested last friday and did a 15% water change right after, which has increased alk to about 7.6.
One of my Blastomussa has been a bit receded for the last 2 weeks, which I thought was caused by a change in flow patterns. Rearranged my pumps a couple of times to get better circulation throughout the tank. The flow near the blastos hasn't changed much as far as I can see. However, it is looking worse as 2 weeks ago and as of today some of its mouths are open as well. Didn't accept a reef roid paste though, it just sits there with its mouths open. This blasto has been in the tank for a year now and been in the same spot for months. I'm now thinking the alk swing is the culprit, but then again I'd expect more corals to react.
None of my other corals are doing worse than before. My torch was looking a bit sad a few days before the waterchange, but is back to normal already. Sps is still growing as usual, my other blasto is looking great and has baby heads that are growing very well.
Any ideas why this particular coral is suddenly doing so poorly? I'm planning to get some coral dip and give it a good dip tomorrow.
Edit: took this picture just now. The brown stuff on the heads is the reef roid paste. My profile picture is what it used to look like. Also, the CB hasn't been nipping, he's a model citizen.

Due to me not having a ton of time and being lazy/forgetful, I didn't check my parameters for a few weeks. I've been slowly adjusting my dosing pump according to the consumption for the last 2 months. Turns out my alk has dropped from 8.3 to 7.3 in that 3 week timespan of not testing. Calc and magnesium have dropped a bit as well, but nothing dramatic. I tested last friday and did a 15% water change right after, which has increased alk to about 7.6.
One of my Blastomussa has been a bit receded for the last 2 weeks, which I thought was caused by a change in flow patterns. Rearranged my pumps a couple of times to get better circulation throughout the tank. The flow near the blastos hasn't changed much as far as I can see. However, it is looking worse as 2 weeks ago and as of today some of its mouths are open as well. Didn't accept a reef roid paste though, it just sits there with its mouths open. This blasto has been in the tank for a year now and been in the same spot for months. I'm now thinking the alk swing is the culprit, but then again I'd expect more corals to react.
None of my other corals are doing worse than before. My torch was looking a bit sad a few days before the waterchange, but is back to normal already. Sps is still growing as usual, my other blasto is looking great and has baby heads that are growing very well.
Any ideas why this particular coral is suddenly doing so poorly? I'm planning to get some coral dip and give it a good dip tomorrow.
Edit: took this picture just now. The brown stuff on the heads is the reef roid paste. My profile picture is what it used to look like. Also, the CB hasn't been nipping, he's a model citizen.







