Thanks man that’s some good info ! I may just end up going this route20mg per gallon, but I did 30mg per gallon for a couple weeks at the beginning. Absolutely no negative effects on corals (LPS, Softies, and a few SPS), and anemones (RBTA, maxi mini, and rock flower). Ran it for over two months (almost 3). I was treating Cladophora, and at first I didn’t think it was doing anything to my caulerpas, but around 3 weeks in it started melting (did lead to a nutrient spike), took around 2 months to kill the cladophora. You don’t want to run carbon for the entire duration or run your skimmer for just the first week (and for 3 days after any re-dosing. Because of the nutrient spike I had to do water changes during the treatment, so for whatever percentage of tank volume I took out, I redosed the same percentage of the initial dose. My initial dose was 800mg (which was around 1.5x the recommended dose), so when I did a 25% water change, I redosed 200mg. If you have any other questions, feel free to ask.