Under Gravel Filter

[Promisedsin]

I got an Under Gravel Filter for a new 10 gallon that I'm going to put my two male bettas in, divided of course. I have never used an under gravel filter and mine has been creating a foam on the surface of the water when I use the air stone that came with it. Is this normal? Knowing that betta fish come to the surface to breathe air i assume that this would prevent my betta from breathing. Is there any way to fix this other than not using an under gravel filter?

 

[mgamer20o0]

can you get the pic of the foam? really hard to tell with out being able to see it.

 

[BigJim]

It's possible that your water conditioner is causing the foam. I've been using Tetra AquaSafe and it will foam if I add too much.

 

[Promisedsin]

I think its just the airbubbles from the airstone building up on top because they are to fine. I took the airstone off and the water doesnt foam.