My pond is teardrop shaped with the deepest part in the center of the widest part of the drop. I think I could remove small areas of elodea with chemicals and not affect the DO, if I raked out the dead/dying plants too. I'll look at the products you suggested Ted. My problem in the spring is that the pond overflows with runoff, and drains down into a local stream, so I don't want to put a chemical in that could affect downstream water. So I've wanted to wait until it quits spilling over to treat with chemicals and then the elodea has already taken off. Any suggestions on what I could use early on that would not be a problem for this situation?
My aerator is a flat square pan type filled with sand that sits on the bottom so I can't really raise it but I have not been turning it off during the day. Night temps have been 48-58 degrees and daytime highs have been 85-88 this past week. I've wondered about the effect of the temp in the air that I'm running to the diffuser since I have a 2000 ft run in black polypipe that goes over lots of bare sunexposed ground... I'll try turning it off once air temps get above ?70 in the morning and back on once they drop in the evening and I'll monitor the pond temp, fish activity.
Thanks everyone for the advice, I love having access to this great resource!
