I only have birdsnests and some montis, but I’ve had zero issues running it for several months (at 1.5x the recommended dose for the first month). It did eventually kill the cladophora I was having an issue with, also a little bit of GHA. For algae other than bryopsis it can take up to 2-3 months to completely kill it, but I’ve had no problems running it that long. Do be prepared for a nutrient spike, take out any carbon, and turn of your skimmer for three days after dosing. Also, because of the nutrient spike, you’ll need to do water changes, so you’ll need to redose whatever you take out (so for a 20% WC, you’d redose 20% of the initial dose).