Hi! My 10yo son has apparently not been keeping up with his tank maintenance. This morning he found these guys on the glass. They are tiny (<1mm) and white. Some have two little sacs on the end, but most are translucent wormy looking things. I've been searching and think they may be copepods? If so, are they harmless? I tested his water, which along with the algae on the glass belies his claims of regular water changes, lol. 6.2 pH (our norm is 7.4), NH3 0, Nitrate 40, Nitrite 0, temp 73. It's a 10 gal tank with gravel, driftwood, and artificial plants. Its sole inhabitant is an electric blue crayfish who eats a combination of blood worms, brine shrimp, flakes, and pellets. Separately, does anyone know if anything can coexist with the cray? My son is wishing for a snail but I have a feeling that would be lunch. For now I am guessing gravel vac and water change? Should I try to eliminate the wormies? TIA!