I'm sure the reduced GSH population is the reason why I have a little bit of FA growing now. In the past I have put a 5 gallon bucket of pond water on the dock and within a few days it starts growing FA in the bucket, I'd toss the FA in pond and the GSH attack it and it's gone in short order. Having a little bit of FA growing will likely help mitigate the strong algea blooms I see in my pond, sechi disk reading usually run 12-16" range in the absence of FA and aquatic vegetation. My water isn't quite so green now.