My mom's 1 gal. has a bunch of black mold-type fungus growing on the rocks and plastic plant. It had never done it until just recently. She cleaned the whole tank, changed all the water, got new rocks, and it still came back. She's had the tank for about 6 years and this has just happened in the last 2 months. I was wondering if anybody knew what this is and how I can stop it
There is one angel fish in the tank. Thanks.
There is one angel fish in the tank. Thanks.