Turn on at 2:00~4:00 in the afternoon on a sunny day, and turn on the aerator at this time, so that the dissolved oxygen produced by the photosynthesis of surface algae can be transported to the bottom of the pond […]
Turn on at 2:00~4:00 in the afternoon on a sunny day, and turn on the aerator at this time, so that the dissolved oxygen produced by the photosynthesis of surface algae can be transported to the bottom of the pond […]