I noticed over the last few days that I have nematode worms in my Betta tank, and have also had a sudden explosion of pest snails, but these don't worry me as I know they're harmless, I vacuum and water change regularly so... The issue is that I just noticed some other creatures in the tank, they're very tiny, white, on the glass and plants, have long thin bodies that seem to bunch up into 2 bulbs (a bit like a bug), and these long feelers/legs. I tried to get a picture of one, but as they're so small the camera wouldn't focus. Are these dangerous to my fish and do I need to do something about these?? He seems healthy and happy, and water params are all good.