This is crazy it’s happening like this.
I would strongly stop vacuuming the sand bed all together. Horror stores start there...
With you having sps, why not just go bare bottom instead of having any sand? I get it looks very nice, but everything builds up there.
Also, this is a long shot, could something be leeching into this tank? I mean if you’ve already done everything listed and nothing has work, that makes me think it has to be something else than this.
If you’re moving the fish out, you should move you’re coral out too.
Then keep doing what you’re doing and you can really experiment what’s happening without a headache of killing your sps.
I would strongly stop vacuuming the sand bed all together. Horror stores start there...
With you having sps, why not just go bare bottom instead of having any sand? I get it looks very nice, but everything builds up there.
Also, this is a long shot, could something be leeching into this tank? I mean if you’ve already done everything listed and nothing has work, that makes me think it has to be something else than this.
If you’re moving the fish out, you should move you’re coral out too.
Then keep doing what you’re doing and you can really experiment what’s happening without a headache of killing your sps.