I have the 29g version of this tank, the one without the LEDs. The tank was getting far too hot this summer it was pushing 82-83f. I ended up taking the lid off and buying a used Kessil A80 tuna blue. I’ve had it for a few months now and my corals have been growing very well, although I think it’s just barley enough light to keep them growing. My tank is full of LPS and soft corals.
I also highly recommend that intank media tower. Idk if you still have the bioballs but I removed all the bio balls. In the top of the media tower I have filter floss that sits on top of a sponge. I change the filter floss once a week and clean the sponge every 2 weeks. Below that I actually just have a few bio balls I haven’t moved them yet. And then in the bottom I have a mesh bag filled with ceramic filter media.
There should be a sponge that separates the 2nd and 3rd chamber. I keep that in there it will help keep sand and things from getting into your pump. I have a fine grain sand in my tank that clogs my sponge so I have to clean it bi weekly to keep the water levels the same in the last two chambers.