I did a quick DO and pH check at the pond last night to find that the DO and pH were 10.7 ppm and 7.9 at 6 inches deep, but differed (what I considered) greatly only 2 feet lower...4.0ppm and 6.7.
My aeration has been running at night (midnight to 8am) for the last week.
Is this normal? When my aeration was running 24/7, the DO differed some (maybe 1ppm), pH differed very little.
If you recall, my Do levels hung around the low end (4 to 6) and pH barely moved away from 7.
I will be doing more water tests this weekend and am wondering if aeration changes are recommended? Part of me says more aeration, the other part says less.