How automatic prawn feeders impact water and soil quality of grow-out ponds in Ecuador.

– As long as shrimp have somewhere to go in pond where DO is not low then they will do that.

– Vertical destratification of water column needed? Paddlewheels not best technology (but simplest/cheapest for required job)

– Mobile acoustic feeders that have capacity to be moved every week to new zone in pond may help?

Save energy – these are not fish. 40+ years prawn DO testing…optimal range for growth and survival to 20g is 4-6 mg/ml…

Dissolved Oxygen in estuaries, where there is an abundance of benthic detritus eating vannamei, sits around 5 mg/ml.

In shrimp ponds the range is from 2-10 – due, not to shrimp, but algae and bacterial respiration diurnally.

Best DO range for shrimp growth and survival is 4-6 mg/ml.p