Hello everyone-
I have a 20 gallon reef tank that contains 30 pounds of LR, 10 hermit crabs, 1 turbo snail, 1 cleaner shrimp, 1 percula clown, and some green star polyps (only coral for now, its a relatively new tank). All my levels are fine (0 ammonia, 0 nitrate, 8.2pH, 1.024 sp gravity), and...