Shrimp ponds under winter greenhouses are prone to oxygen shortage — and the most dangerous hours are 4:00 to 7:00 in the morning, when DO reaches its daily minimum. Aeration equipment should therefore run every night through the winter cycle.
Beyond the nightly run, switch aerators on immediately during the middle and late stages of the crop, and whenever rain or overcast weather arrives.
What about midday, when the sun is strong? Photosynthesis is at its peak then, so oxygen shortage is unlikely. The purpose of running aerators at midday is different: it stirs the water and creates convection between upper and lower layers. The rising motion carries oxygen-saturated surface water down to the bottom, lifts low-oxygen bottom water up to the surface, and brings inorganic nutrients up to feed the phytoplankton — keeping the whole water body in ecological balance.
In short, for winter greenhouse shrimp farming: run aeration every night without fail, add midday runs to break stratification and recycle nutrients, and switch on immediately in the middle/late crop stages and during cloudy or rainy weather. For blowers, microporous tubing and disc systems sized for greenhouse shrimp ponds, contact us with your pond area and depth.
