No problem Dan,
in general, I didnt want to mislead anyone into thinking they dont have to monitor their pond water. depending on where yer at in this fine country you might have problems with yer pond water chemistry. pH in particular if yer near former or active industrial areas, nitrate if pond receives heavy ag run-off, etc.....its just that in my case i live in a fairly pristine watershed only potentially influenced by few and far between residential septic systems, the closest one about 10 acres away, so I just dont worry about my water quality, i know its good and i'm lucky.....and one of these fine days when i dont have much to do, i'll profile my general chemistry parameters just for my own info., every pondmeister should have an idea of their water quality..... myself included.
edited post.....Dan, i've used (rented) horiba and YSI DO meters in downhole well testing, they are great instruments. I dont own one, but have thought it would be really cool to vertically profile DO in pond throughout the summer with and without aeration.....just a money issue for me though, they arent cheap.