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Bob,
I have an alita air pump with a manifold going to a 8' airstone near the exit area of the settlement barrel, One 12' in the Bio-filter barrel and another 12' in the main pond underneath the TT for upflow through the TT. Obviously I also have the TT. Temp has been kept at 70F-72F, and I have been running 94%-100% on the O2 saturation.
Lester
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