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Old 04-28-2013, 04:10 PM   #1
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2 spong filters - one pump?

Hi, I have a 20 gallon tank with a sponge filter, powered with a whisper 20 airpump. My question is could I add a second sponge filter and run the same pump?

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Old 04-28-2013, 05:34 PM   #2
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maybe, if the air pump puts out enough pressure. You'll need a Tee and an air adjuster to balance the flow between the two.

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Old 04-28-2013, 05:56 PM   #3
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I have 8 sponge filters attached to a whisper 60. Depends on a lot of things - length of airhose, depth of tanks, location of pump. I keep my pump above tanks and take a chance by not using a check valve. If your pump is below the water line, you need a check valve. Any airstones you use will need a lot more pressure. Best advice is to try it and see if it works for you.
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filter, filters, pump

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