We recommend 24/7 operation of our pumps because it is much less stressfull than the on/off cycle both on the ecosystem and the pump. In my opinion it is simpler for the operator to troubleshoot a problem in the pond when they know the pond is mixing continously. With a 3 acre pond you're probly looking at a 3-6 plate system depending on depth. Shoot me an email if you'd like to talk

Justin McLeod
If you don't know where to start, go back to the beginning.

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http://www.thepondguy.com