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Re: What plants will Flourish Excel kill?
I can tell you the little I know. Flourish Excel contains an industrial form of carbon called "Gluteraldehyde". The SeaChem product contains just a trace, about 1.5 percent.
In high doses "Glut" is used to kill algae. Algae is a primitive plant, so other primitive plants like ferns, mosses and some varieties of Vallisneria can be damaged. I used Flourish Excel and another product called "Cidex" a couple of years ago, for a very short time and my Corkscrew Vals died within a couple of weeks and my Java fern was damaged, but recovered. My Singapore moss was uneffected. The little algae I had in my tanks was killed and hasn't returned, but I attribute that to heavily planted tanks. My other low light plants did pretty well.
I've found several liquids that work just as well, if not better than Flourish Excel and don't contain the "Glut" carbon fert.