Good news that it is getting better. As far as salt, I use instant ocean reef crystals. Certainly not the best but it's what they carry at Petco and PetSmart in my area. Brs did a couple videos recently on salt as far as mixing time and precipitation of calcium and alk. It seems like tropic marine coral pro is better than most, but they even admit that salt choice is negligible in a thriving reef as long as you pay attention to everything else. Again, I'm glad things are improving in your tank.