I didn't pump any clear water from the creek this year into my first pond. I got tired of it, running the pipe, and pulling it back, and we had some decent rainfall at times. I think it was the creek water causing the FA to flourish. Also, the creek water seems to contain some type of natural flocculant, which made the pond clear, and that accelerated the FA production. This year the pond is sort of murky, with visibility about 10-12 inches most of the time.

I've never pumped much creek water to the newer pond. The times I did, it cleared some, and FA got started a bit, then the pond muddied again, and the FA mostly went away. This year that pond has zero FA.