I used it for bubble algae and it worked, took me a little more then 3 months for it to go away I never had any of the problems but I took it slow. It will kill your chaeto I left mine in just to see what would happen. I never hand a nutrient problem because 100% of my export was my chaeto and with it going away I didn't have any export. I did get the starts to Cyano in my sump but I turned the light out and it died out but I never hand any of it in my display. Would I use it again IDK it seemed to take a lot longer then I would have hoped but i did have bubble algae everywhere.
Just curious for those who had it bottom their nutrients what was you using as nutrient export?