Koi-lo wrote:
wrote in message
ups.com...
Well, I have two small goldfish in a 5 gallon tank. I know I know,
thats not enough room but thats all I can afford at the moment.
Anyway, I bought a 15 gallon air pump (i'm looking into getting a
bigger tank) which is attached to a filter, and and airstone. The
airstone is blasting out bubbles and its making the top of the whole
tank all bubbly/foamy. There is hardly any surface water that isn't
bubbly. Is this normal or do I need to do something? Thanks for any
help.
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You need to get a valve to bleed some of the air off. It should be
gently bubbling and not making the tank surface look like ocean surf
during a hurricane. A 20g Long tank would be better for 2 goldfish
than a 15g standard.

And if it's actually FOAMING, you probably have a lot of crud in the water
and should do a water change.