I have a two year old 75 gallon mixed reef. I have a dual brs reactor with carbon and gfo. I have eight fish and mixed softies and lps and some shrimp, snails, one rbta. I changed my media yesterday as I do once a month. Overnight my water clouded up and took on a brown hue, obviously the gfo got into the tank. Can't figure out how as I took the reactor apart and it all looks normal. I took out the gfo and replaced with carbon so now I run carbon x2. I changed water with what I had left. Fish that I can see are alive but I can't see more than 1-2 inches into tank. Water is murky and reddish toward the bottom. How much trouble am I in? Is this gonna nuke my tank? Aside from water changes what else should I do? Anyone seen a brs reactor do this suddenly? It's worked fine like this for 2 years...