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Shrimp aeration is sized on standing biomass, at roughly 1 hp per tonne for intensive culture, and rounded up to whole paddle-wheel or aerator units. As biomass builds through the cycle the requirement grows, so aerators are commissioned progressively rather than all at once.
Aeration requirement
hp required = biomass (t) x hp per tonne; aerators = ceil(hp required / aerator rating)
An aeration failure can kill an entire crop within hours. Provide standby power and low-oxygen alarms, and never rely on a single power source.
Just before dawn, when respiration has drawn down dissolved oxygen all night with no photosynthesis. Aerators should run continuously through the night in the second half of the cycle.
Very much. Paddle wheels should be positioned to create a circular current that concentrates sludge in the pond centre, keeping the feeding area clean.