glad to hear how its working out for you. This might be one of those "benchmark years" - for you and your pond. When you run into similar situations later on, you'll have experience on your side - and you'll know 1st hand what did and didn't work. I have a pond about 1/2 your size - with a very similar make up. (except I have YP instead of GSH).
Not as ot in central NY - I don't run a diffuser. My pond stratifies at times in the summer - and its been warm here too. I don't live at my pond - but I sample it a coupe times per month. I have a few older SMB (16") but haven't seen them in a while - hoping that they are doing OK. Most of my SMB are 8-10" too.
FH
