I have been using Seachem products for a while now and have never been disappointed. I use them with all my zoanthids and discos and they are great. I've had worms squirming out of rocks and a few unfortunate brittle stars. It's something like (mostly similar?) an iodine solution. I mostly use 10% povidone but it seems to be more benign/less potent in terms of coral damage. I would recommend this to others looking for a safe coral dive.
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