I've have these tiny little white worms that swim in the water with a flaggelating motion and that crawl onto the grass lids of my aquariums- i was under the impression that if i were to do many water changes they would go away- not the case! I seem to have many less in my goldfish tank (30 gallons) cause the goldfish eat them when they swim. in my pleco/bala tank (80 gallons) they are much more prevelant. How do I get rid of these? they seem harmless but they are all over the glass and not even wiping them off seems to help. Supposedly they are from too much food but I have tried cutting back on food. help if you can please...