Air pump necessary?

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fishman1121

Aquarium Advice Regular
Joined
Jun 13, 2013
Messages
52
Location
Burbank, CA
I have a 40 gallon tank and I was wondering if the air pump was really necessary because it makes an ugly mess of billed that sit on tom of the water. What do you guys think?
 
If you have a filter that has an outflow that breaks the water surface you may be able to make do with no airstone on the assumption you're not over stocked.
 
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