Posted: Sat Mar 31, 2007 2:32 pm
When I've seen frothy bubbles like that in a tank (usually a smaller tank) and it was shortly after a water change, it was often because the same media had been used for a long period of time and/or the media needed to be cleaned more thoroughly (I don't use any water conditioner/dechlorinator). If you adjust for the water conditioner and the bubbles still appear, try cleaning the filter better.
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-