Water pump and heat

carbJanuary 26, 2013

Hi, so i noticed that e water inside my reservoir was warm when i tested my water pump. The water was just recirculating inside the tank, it was completely covered. I am also using a big styro box without about half full (15liters) of water. The pump isnt big, just your normal 20gallon aquarium pump.

Any thoughts or is this normal?

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What do you mean by "warm water?" Measure the temperature of the water and see exactly what the difference in temperature is.

Also, are you planning to pump your water up to your plants? If so, that might help in cooling the water.

    Bookmark   January 26, 2013 at 7:56AM
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Measure the temperature of the water after a few days and compare it to the ambient temperature. You can't really expect it to stay below the air temperature indefinitely.

    Bookmark   January 26, 2013 at 9:23AM
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Pumps make heat and styrofoam will hold it in.

Warm water is bad for roots. You might consider replacing the styrofoam reservoir with a more typical non-insulated plastic box.

    Bookmark   January 26, 2013 at 10:49AM
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that makes sense on the styro keeping the heat of the pump inside. The reason I opted for styro is because this will be placed outside in the warm weather of tropics. I figured the styro will help keep the sun's heat out.


The water is circulating inside the box and not yet going into the plants. Prior to that, the water was cold to the touch. I left it running about 3-4 days and came back to see and the water was warm to the touch. The box was placed inside the house where air temps are fairly stable.

    Bookmark   January 26, 2013 at 11:16AM
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You have the right idea in trying to keep the roots cool.

Burying your reservoir in the ground would be best. You would need to build a drain for the hole, too, so that rain water does not flood it. Second best to the hole would be stacking concrete blocks or big rocks around the reservoir.

    Bookmark   January 27, 2013 at 12:46AM
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Thanks for the suggestion Robbie, I hadn't thought about stacking blocks around the reservoir. I agree burying the tank in the ground would be best, though it's not an option right now :(

    Bookmark   January 27, 2013 at 1:52AM
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I totally agree with "carb", because burying tank in ground would be best option till now. Any suggestion?

    Bookmark   January 28, 2013 at 4:33AM
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You could run an external pump or you can add bottles of frozen water to reduce rez temps or you could run a system that doesn't require continuous running of the pump. those are the basic thoughts I have on how to limit the temps.

    Bookmark   January 28, 2013 at 7:17AM
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