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How long do I run the pump

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Old 01-31-2009, 08:07 AM
Mike C Mike C is offline
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Join Date: Jan 2009
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Default How long do I run the pump


How long do I run the pump if I'm using rockwool and have the light on 24 hours a day?


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Old 01-31-2009, 08:08 AM
Ron Ron is offline
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Join Date: Jan 2009
Posts: 1,285

Rockwool holds water longer than grow rocks so I wouldn't water as much. Maybe every couple of hours or so. Only let the pump run long enough to wet the rockwool and then let the solution drain back to the tank unless you have to use a timer that runs longer then you don't have much choice but to let the pump run the minimum on time of the pump. A Dayton 1or 2 hour Cycle Timer from Grangers is the best but cost about $80.00. For serious growers you will have to buy one of these no matter what they cost.

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