I got a little maxima a few weeks ago. It’s smaller, 2” and didn’t attach to the rubble I put it on at the bottom of the tank. I intended to move it closer to the lights after it attached. It didn’t attach, and started to look like it wasn’t extending as much as it had. So I took the risk and moved it closer to the top. It sent out byssal threads, so I thought it was going well.
Until I was out of the house for 12 hours, and came home to a tipped over and angry maxima. :(
I don’t know how long it was upside down. One of the scutes broke off. I placed it on a piece of rubble again, on the bottom, until I’m sure it’s attached. I don’t want it to take another tumble.
It extends fully and reacts to shadows. But there is a small bleached spot by the scute that broke off. I’m terribly worried, but resisting the temptation to reach in and coddle it, afraid I’ll just stress it more.
Should I move it closer to the light to repair the bleached spot, or assume it’s from the damage to the shell and let it alone? The last time I had it higher in the tank, I thought I had it in a safe spot and was clearly wrong.

There’s nothing in the tank to pick on the clams. Occupants besides the maxima are a squamosa, dragon goby, starry blenny, clarkii pair, chromis, feather dusters, peppermint shrimp, fire shrimp, scarlet reef hermits, and turbo snails. Ammonia, nitrites, nitrates are all zero. Ca is 440, I occasionally feed DT’s. I have 6 T5s on a 90g.
I’ve had a 3” squamosa clam for a while that seems to be doing well. It’s color has improved since I got it over a month ago, and it has attached to piece of rubble. It was doing so well, I decided to try the maxima.