I added some Epsom salt, will test in a bit to see where I'm at. I have added coral recently, but 1600 shouldn't be too much for them? Just some favia, chalice, and a couple gorgs.Boost mg up to 1600ppm. I like doing it at 100ppm intervals until I reach 1600. Mg may help with digestion, I wrote a thread "Why mg". I documented bloated predators where I boosted mg and showed pics of actually bowel movements. Fish like anglers and scorps actually poop like a dog turd, so you may even see it laying around the substrate.