I have a 125g tank with 1 oscar and 2 convicts. Recently I noticed tiny little white worms (about 1-1.5mm) crawling on the size of the tank on the glass. I have restricted feeding because there are some planaria as well but the ones on the glass don't seem to go away. I have sand as the substrate and all the waste tend to float on the sand though I try to suck them out with a vacuum once or twice a week with WCs. Do you know what kind of worms this is and how to get rid of them.