There are what seems to be really small white worms crawling on my glass in my 100g tank. I have a piece of drift wood in there from the local lake and I am thinking they coould have come from it. I just noticed them but there are a good many of them all ove rthe glass and they do seem to be alive because it looks as if they are crawling. The tank has been set up for almost 6 months so I am not sure why they are just now coming out....anyone got any ideas as to what they could be?