First off, this is my first post. I recently lost everything in my tank this past weekend. I have a 55 gallon reef tank. I had a Salfin Tang, two Clowns, Lawnmower Blenny for fish. I had a RBTA, Candy Cane, Blue Mushrooms, Hammer, Green Star Polyp, Kenya Tree and a Leather Toadstool for corals. I decided to build a refugium to help control water parameters. The silicone I had used to place my baffles wasnt FDA approved (bought from Home Depot). Within an hour, my tang looked sick. Within four hours all my fish had died. The following day all my corals perished. I was very disappointed. I want to start again. This site has helped me out with every aspect of this hobby. I am typing this hoping to receive some encouragement. I am in the process of doing small water changes to get my parameters back to normal. If anyone can provide some words of advice, I would highly appreciate it. Thanks.