Theo,
Is it really necessary to worry about hydrogen sulfide this early in the season? Shouldn't there still be ample D.O. in the deeper water?
Not sure, Cecil, good question. I assume H2S will be produced during most of the year, except during and right after turnover times.
If Lusk, Cody, or one of the Aeration pros made a statement one way or the other I'd go with that.