Posted: Mon Aug 13, 2007 4:20 pm
Welcome to the forum. A picture would be helpful, but since you say it can be wiped off with a washcloth but comes back in about a week, I'm wondering about your set-up.
How big is the tank?
How much water is in it?
Do you have a filter?
How often do you change the water and clean the tank?
Does anything else get this brown fuzz on it? The basking area? Rocks?
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-