Crash

[canadianbudz604]

So after almost a year of success with my tank and not having one thing die I added a full unit of chemi pure elite on Boxing Day and the next day, everything closed up cyano starting glass turned yellow over half the corals closed up, fml. I haven't added anything else at all. I've been Changing a gallon a day with do water. **** me off I threw the chemi pure out the window of my room what else can I do