Foam

Hi,
I have a 20 gallon fresh water tank in which I'm raising 6 Angels with the
hope of obtaining a breeding pair. The tank is heavyly planted and I feed
the Angels 2X a day and the plants once a week after a 25% water change.
Fish and plants seem to be doing fine.
Recently there has been a buildup of foam around where the airstone bubbles
meet the surface. The last 2 days the foam has covered 1/2 the tank's
surface.
Should I be concerned??
Thank you

I know that the foam will inhibit the exchange of gasses in your tank. It
reduces the surface area were oxygen can be absorbed into your tank. Not
sure what causes it, but one guess would be excessive nitrates?

JOhn :-)


"John" <astro_nut41 RemoveThis @hotmail.com> wrote in message
news:bNydnbI1xprgyASiRVn-ug@wideopenwest.com...
> Hi,
> I have a 20 gallon fresh water tank in which I'm raising 6 Angels with the
> hope of obtaining a breeding pair. The tank is heavyly planted and I feed
> the Angels 2X a day and the plants once a week after a 25% water change.
> Fish and plants seem to be doing fine.
> Recently there has been a buildup of foam around where the airstone
bubbles
> meet the surface. The last 2 days the foam has covered 1/2 the tank's
> surface.
> Should I be concerned??
> Thank you
>
>