Its completely up to you. Since the pump is a filter and helps keep the pond oxygenated I would use your test kits to make sure it stays in the proper parameters while cutting the run time back.
Yes you need to leave your pumps on 24/7. You learn more about pumps on http://www.richdeer3pondsupplies.com Just look under the pumps page for ABC of Pumps and How to figure the energy usage. More questions? email me at (e-mail address removed) All forum members receive a 10% discount. April code; showers May code; flowers Happy ponding, Gail
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