Looking good soul!
Nearly picked up a maxima yesterday from the LFS, but decided to wait for a while till I get my tank "sorted" with new lights, apex, ATO, and mp10's.
Yeah, you don't want to get a clam acclimated to power compacts (A. it probably won't so it won't do well, B. you'll have to put it at the absolute top of your rockwork and have to move that rock to the bottom when you add LEDs).
Clams require a commitment. I've noticed that mine is finally starting to grow (you can check by seeing how much white is at the top of the shell, i.e. new growth, under the mantle, when it is retracted).
I started with two maximas, one just wasn't happy anywhere in the tank, kept moving itself and burying itself under my rocks (yes, it would dig out the sand under a rock and slide itself in), and was never happy, and one day wasn't there anymore, just two empty shell halves
). The other is, well, happy as a clam, at the bottom of the tank in the sand bed. Doesn't even mind the angel swimming over/near it every minute or two. No bleaching, decent coloration. IME clams can be finnicky, so be prepared for the worst, but do your best to make them happy.