Hello. Don't stress too much? How when it is killing my coral. I try to remove it daily and just keeps smothering some coral. My water params have been stable for a couple years except for silicate, according to ICP in 6 months went from 78ppb to 474ppb. I just got my Hanna Silica LR tester and get 0.61ppm, the max range on tester is up to 2.0ppm. I was told it is not the cause of my problem, but the 2 coincides here. I don't get it. If I can get that stuff here I will try it, thanks for the mention. Also the same salt and water used here, nothing new.