Hey Joker glad to hear your air station is still working good for ya! Mine is doing great also! Real easy setup and no fuss or muss about it! Although I have been thinking about making another 4 station setup with my fusers a little farther apart just to see how it works. Otherwise things are working great. It good to know what your DO is I was wondering how mine was and if your pond is 3/4 acre like mine I would have to guess my DO is close to yours. Thanks for the update and the DO readings.