I am trying marine algaefix. Taricha mentioned it is very effective. So I’m trying it today. Will report back hereWell a week of heavy h202 dosing and no real effect, again I do not have it really bad just pops up in several places and gets worse the longer I let it go. I can siphon it out and its back in a couple days, so I do not think h202 really does much for chrysophytes at least the ones that I have. Next up is vibrant, dose 1ml per 10g tonight, and yes I understand what is in it based on all the work @taricha did but I have read a couple of threads where it did possible have an effect. Not sure what kind of dosage @ScottB did and how often but my initial thought was to go weekly after water change and see if it has a different outcome. Trying to pull one lever at a time, so I am not doing to many things at once. I have a bunch of Halimeda macro algae and some feather caulpera in my sump, so I am hoping it doesn't kill all of my macro's but I guess we will see. I have pretty low nutrients, 8ppm Nitrate and .05 Po4 so I will have to keep an eye on them and dose to keep them where they are.....