It's been a couple of weeks since I treated my 1 acre pond with the "witches brew" of enzymes and bacteria. The dead Floating Heart (eradicated with Glyphosate) is slowly decaying, but I'm still having to spot treat for new growth (small patches where the roots have remained stubborn). I suspect I will be finding isolated patches for a while. Any algae is easily controlled with Cutrine Plus. The amount of dead plant material is greatly decreased; areas that were choked are opening up and the water is remarkably clear. So what part does the added bacteria play in the process? I have no way of telling, at least not scientifically. What lake bottom I can see from shore is clean, no sludge buildup, even an absence of leaves and other runoff material. So everything looks good. I have to remember to remain patient; that this cleanup will take time. But the improvement is truly impressive. My expectation is to have a clean new pond by the end of the summer.