What is this white web-like stuff in my aquarium?
It's a 4 gallon tank with a filter, some java moss and a few other plants, a bunch of snails (unfortunately) and one betta fish. It's been set up for almost a year, and suddenly I am seeing this white web-like stuff all over the gravel, and some on the glass of the tank. The amonia, nitrites, etc, are 0 or close to it. What is this white stuff, will it hurt the fish, and how do I get rid of it?