Ok, I by no means do not know of this is an answer to your problems. But you might try this. Dose amino acids, sometimes it will make acros turn fuzzy. And maybe try knocking flow up a bit. I have a 78 gal. Half circle. I run two mp10s at a 100% and coralvue gyre at 60 percent. And who knows if this will help, but everytime I have and acro that seems off, if I increase flow to him, he will get happy. Do you dose mag? Acros eat up mag. Like crazy. I dose 50ml daily. And it could be that you are doing nothing wrong, but at some point you ****** them off unknowingly, and it is just taking a longtime for them to get happy. I had a similar problem to yours, and after sometime, they got happy again. Just do not do anything fast. Experiment slowly.