75 gallon FOWLR total reset help. - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 12 Old 01-05-2013, 04:36 PM Thread Starter
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Really? I thought if the pump was smaller than the overflow that the sump would flood.
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post #12 of 12 Old 01-05-2013, 04:50 PM
No, if the pump doesn't fill the tank, it doesn't fill the overflow box with water either. The overflow box waits for the water, that's how you get gurgling noise also. That's why you try to match as close as possible the overflow and the return withiut going over, if you have to much return the overflow can't keep up and you overflow the DT.
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