diy sump - The Planted Tank Forum
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post #1 of 6 (permalink) Old 12-21-2014, 02:46 PM Thread Starter
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diy sump

I have a 20g sump running on my 75g display tank. I have a return pump and a canister returning water back to my tank.

So here is my question. Is it normal to be losing 2" of water in the return chamber every day or two
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post #2 of 6 (permalink) Old 12-21-2014, 02:57 PM
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I would say yes, normal. The return chamber is where you experience all the effects of the evaporation. This time of year evaporation always accelerates for me and I feel like Im contantly adding water to the sump to avoid running dry. Time for an ATO?
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post #3 of 6 (permalink) Old 12-21-2014, 03:12 PM
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If the 20 gallon is 13" tall then there are .65 gallons per inch. 2" would be 1.3 gallons. I estimated I lost 1 gallon a day from a 100 gallon tank run open top so this does seem a reasonable amount. Bigger sump? Cover the tank?

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post #4 of 6 (permalink) Old 12-21-2014, 03:19 PM
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Yes, I also am having to top off my sumps pretty frequently. You can cover it, should slow the loss and help retain CO2 if it is well sealed.
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post #5 of 6 (permalink) Old 12-31-2014, 01:31 PM
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I lose about 1/4" a day in my sump. I take it you don't have a tops on your tank. It would increase your water usages. I use to use lot more water until I put on glass tops.
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post #6 of 6 (permalink) Old 01-02-2015, 03:45 AM
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i have a 20 long under my 60 gallon reef tank and during the summer, with the halides on and the fans blowing on the water of the display i use approx 1.5-2 gallons of top off a day. the height in which your return area of your sump all depend on the size of the return area.
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