Yes it did turn a couple weeks ago and all kindof material came to the top. This is normal as the water will turn twice per year when the temps on the upper third are close to the bottom third. As Cecil said the foam is probbly ok and i have the same thing and it is normal. I would have you water checked but dought you have a problem up there. Cecil mentioned that the o2 in the mountains is much less than where he lives just as it is for us when walking up in the mountains. I would really watch the temps in the summer and if they get high i would never shut the aerator off until we get the cool late August evenings. I would treat it with some benefical bacteria/enzymes-they will do the pond good and also make the fish taste better. The bacteria will replicate millions of times and stay in your pond to keep it healthy. I use Agua 5 and get it from Spotted tail Trout Ranch in Nebr. Check the Web. Also this guy (John) Bovee) supplies many Colorado fisheries in your area and it would be good to talk to him.

jdm