I have a 150 Gallon with a Jack Dempsey, Tiger Oscar, Pacu, and a Pleco. Recently I noticed there were little dots around the top of the glass on the inside. Not long after, there were squiggly lines. These lines are stationary, but if you splash water on them or touch them, they can squirm. Now when I open the hood, several gnats come out. I'm assuming either the squiggly lines or the dots are eggs, but I can't get rid of either one of them. Anyone have any ideas that are safe for my fish?