The clearer the water the more DO ?
Normally that would be a "no" answer. But there are more factors to consider:
Water temperatures are cooling so less O2 is being consumed by the less active fish.
Reduced nutrient load produced by inactive fish.
Cold water holds more O2.
Clear water increases available sunlight for photosynthesis.
If you look at the data, the clarity has dropped slightly from its high so there may be some plankton activity re-occurring.
The circulator is running 24/7.
