If it's the one I'm thinking of I thought that it's purpose was a chaeto light?My Cheato all melted away when I added the Tunze led submersible light. Maybe a coincidence and it was something else. But, happened at the same time.
I'm thinking that it's just a coincedence as far as the light goes. I've had Chaeto melt before- got some new stuff from @Salted and it did fine with the light I had- he lost his and got some from me and did fine- no change in lighting- we've been back and forth with the same original batch for over a year now. I use 10w white cheapos from Amazon and they have been fine so far. I took some of the chaeto and the graciallis and switched sides to see if the light has anything to do with the meltdown- my last trade with @Salted is doing fine in his sump- so if I need to start over again- it's great to have friends hereIf it's the one I'm thinking of I thought that it's purpose was a chaeto light?
Without looking into this stuff, I would think it's some sort of fertilizer ( nitrates ) and I have plenty of that-Feed it cheato gro brightwell makes it