I found what appear to be fruit flies or some kind of bug flying around my tank. Normally this wouldn't alarm me but I found some orange worm looking things in my co2 diffuser... When I saw them it reminded me of mosquito larvae so I wondered if the bugs had layed them. Is it harmful? Should I get rid of it? Are these little orange worm looking things (they are very small and don't appear to move) larvae of the bugs? Or are they some parasite? There aren't any inhabitants besides a few snails and some plants.