It was flourish iron, Which I believe is Ferrous Gluconate. I had it for my planted freshwater tank. I don't think this thread has much more life so let me hijack a little. I was having trouble getting the cheato in my 40 gallon fuge to grow and was also have green slime (cyano I think) that wouldn't go away. So i put a little of this stuff in the refuge which immediately started clouding up. Then the display clouded up, all my fish seemed fine except a yellow tank that went tits up ricky tick. I pulled him and put him in my clean 29 gallon hospital tank but he didn't make it long. Then the Cheato really took off. Spores or something must have gotten into the display. I have an above tank refuge that gravity feeds into the main. Everwhere where current pushed against the rocks Cheato started growing, and unlike what I've heard, this stuff attached real strong. It would get a couple feet long in only a few days and I would reach down and tear it out by the handfull. My tank is 30 inches deep, so it was hard to get it all. Foxface loved the stuff but it was to much for him to even come close to denting. I also had a little patch of sargassum that sprung to life and grew clear to the top of the tank. When I finally pulled that stuff out if nearly filled a 5 gallon bucket. BTW, Naso tangs love that stuff. I've since moved and taken down the tank. I poured boiling fresh water on the patches of cheato to kill them and the rock is cooking now (no not with boiling water, that was a spot treatment, they're sitting in a rubbermaid tote in my basement in the dark) I'm setting up a new 225 and the 150 in my new house but I'm going to skip the Flourish iron this time.
Mike
Mike
