Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants What is it and how do I get rid of it?

Excessive uneaten food certainly contributes to nutrient buildup, so that could be a factor, but I can't say if it would be the only reason. I think that unless a pond is really tightly managed on a very strict basis, a change in one parameter perhaps isn't so likely to cause a big change in the pond like your experience. I could be wrong, but my gut feeling is that it would require perhaps several different things happening to cumulatively have that effect, unless of course it was one really big event. I'm truly a novice - if there is a lower level, I'm actually probably at that level! - at pond management and am still just trying to learn myself, so this may be totally flawed thinking. But, yes, uneaten food does lead to nutrient buildup and that could be one thing affecting your water right now.