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Old 04-06-2015, 07:21 PM   #1 
learis
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Minimum Air Flow Rate for a Sponge Filter

Weird question: What's the minimum airflow rate needed for a sponge filter, or is it just something you have to eyeball? I got this air pump that is nice and quiet but very weak. As long as it's blowing bubbles through the filter, is that good enough? Or does it need to be a certain strength?
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Old 04-06-2015, 07:31 PM   #2 
kjg1029
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aslong as your seeing bubbles pretty much constantly, then id say youre fine. Ive never heard of a rule for the pressure ammount, its more like as strong as you can have it without it being stressful to your fish
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Old 04-06-2015, 08:02 PM   #3 
MikeG14
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What air pump are you using? You really want as much air as possible going through there to feed the BB. I use a Tetra Whisper10 to power my sponges it seems about perfect for the job in my 10 gallon tanks.

Remember to clean the sponges in old tank water to clear them out. Just swish them around and give them a few squeezes. Dirty sponges will reduce your flow as well.
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Old 04-06-2015, 08:09 PM   #4 
learis
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Quote:
Originally Posted by MikeG14 View Post
What air pump are you using? You really want as much air as possible going through there to feed the BB. I use a Tetra Whisper10 to power my sponges it seems about perfect for the job in my 10 gallon tanks.

Remember to clean the sponges in old tank water to clear them out. Just swish them around and give them a few squeezes. Dirty sponges will reduce your flow as well.
it's this one http://www.amazon.com/Altum-Aquatic-...=altum+aquatic

the altum nano air pump. It says the air flow is 280ml/min. Ive had the whisper 10 and this one is definately weaker, but its quiet which i like.
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Old 04-07-2015, 06:43 PM   #5 
Hallyx
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You can actually test the amount of flow by tilting the sponge filter near the surface and filling a pint bottle. Time it and multiply the water by eight.

That's what was suggested to me. I never could get a satisfactory reading. But, just because it's bubbling does not mean it's flowing.

If you can install and airstone down in the filter, it will increase the efficiency by a noticeable amount.
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