Thanks for jumping in. It is heartbreaking seeing fish float and nerve racking not knowing why. We haven't had any hard rain in over a week now. I have attached a picture so you can see pond lay out. The fountain draws from about 1-4' down and is shooting water about 15' in the air. No diffusers yet. Some of the perch seem to also have a reddish tint but I'm not sure if that is part of their coloration or something else. Attached a few more photos. I will try to get a water test kit.
