pond agitator question

Ray · Apr 20, 2014

I installed a kasco 3/4 hp agitator in my farm pond.When I plug it in it runs for about 30 seconds then submerges in the water.If I unplug it,it bobs to the top again.It has a little propeller on the top of the motor to move water.
The only thing I could figure,maybe it's running backwards somehow.Any Idea's.Thanks.

ray hofstetter · Apr 20, 2014

When it runs for 30 sec, does it spray water up before it sinks? We've got 3 of 'em at work and they've never done that. Water in the float?

Ray · Apr 20, 2014

It blows water up probably a foot,then slowly sinks.The float bobs back to the top when unplugged.

ray hofstetter · Apr 20, 2014

We had one that shot the impeller up into orbit,never to be seen again. It still gurgled, about a foot high but never sank. I bet there's a hole under the water-line that has let water in and some air is trapped in the above water portion. It can't maintain it's floating ability with the pump running. Anyone been using it for target practice?

Ray · Apr 20, 2014

I just put it in,it did it right away.It really blows water up for about 30 seconds then starts to slow till all you see is a water ripple and the unit is gone.Unplug it and it bobs to the top.

ray hofstetter · Apr 20, 2014

I don't know, unless someone else has the answer, i'd try Kasco website and ask them what's up. We've replaced the 3 at work several times (we get about 3 years out of 'em) and have never seen one do that.

showcrop · Apr 20, 2014

It's got to be missing a restrictor somewhere, most likely on the discharge.

Prawn Farmer · Apr 21, 2014

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.

pond agitator question

Ray

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ray hofstetter

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Ray

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ray hofstetter

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Ray

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ray hofstetter

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showcrop

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Prawn Farmer

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