IM 25g AIO build

[Llorgon]

The tank has seen better days. Since my large water change 2 weeks ago my duncan coral has been closed up. I tried feeding it and I got one head to take a LPS pellet, but didn't get it to open up. I have tried moving it and still no luck.


Also noticed that my two kenya trees have been really closed up the last few days so something is going on. The acans, favia, hammer and frogspawn are all doing well though.


I did my regular 5 gal water change yesterday and I'm hoping that will help the tank.


I tested the water and nothing out of the ordinary. Calibrated and rechecked salinity and it was still at 1.026. I've put in fresh carbon which hasn't helped either.



Any ideas on what could be going on?