Water also soaked into the cloth from the tank and seeped out. Dead eggs can be a problem, too. If they are not removed from the tank, they can spread diseases. To get rid of the dead eggs you can suck them up with a turkey baster. You can tell they're dead when they turn whitish, and when you blow at them with the turkey baster they float up.
Live eggs are a clear yellowish color.
Remember to keep your hands and tools clean when you test for dead eggs. This should be done every day until they hatch. The Powerhead pump installation was our next problem. It needs to be placed in a plastic cylinder that hooks into a hole in the under gravel filter at the bottom of the tank. Mrs. Rockwell, our teacher, didn't put the powerhead pump into a cylinder.