I recently had my water tested and noticed that my tin levels are high. I have lost a bunch of corals recently and was trying to figure out if this was the case. I was recommended to do water changes to lower the levels. I don't have any metal objects in the tank that are rusting that I have noticed. I have some magnets for probes and power heads but they do not appear to be rusting. I also noticed my sand is clumping together very badly. Will the tin bind to the sand and rock? Should I remove everything and start from scratch? Please advise as my tank is doing rather poorly.