I use a single 3/4hp rotary vane compressor located in one of the barns to supply the high volume/low pressure air to the diffusers in my half acre each prawn ponds. I am still on the original carbon flaps. I also have a regenerative compressor sitting back in reserve but have never needed it. With only one motor running that is pushing air rather than water,the power cost is much lower, no freeze-up problems in winter, only 1" black poly line out to the ponds rather than wires, too. I made a manifold from the 1" line out of galvanized pipe nipples and have two 1/2" ball valves to control air volume to the diffusers located at the pond bottom. In addition to eliminating thermo-cline/stratification plus immediately adding oxygen to the bottom of the pond, it also carries the nitrogen and CO2 up to surface resulting in far less algae.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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