Help, tiny white things crawling along the glass!!!

[labloverl]

I did a water change a few days ago, and today I noticed that there are TINY white string-looking-things crawling along the sides of the tank! They probably aren't any longer than 1/8 of an inch. What are they? Are they harmful!? When I did the water change, I did scrape algae off afterwards, so it was released into the new water. Was that wrong? I also added a new fake plant.

[LaLaLeyla]

They aren't harmful. They come from un eaten food.

[labloverl]

I did do a lot of re-arranging yesterday, and stirred up a lot of stuff. Thank you! I was about to do another water change and scrub them all off!

editing to add that they are MUCH smaller than 1/8 of an inch. They look like little worms, and some are floating at the surface. They crawl fast too.

[LaLaLeyla]

Try siphoning the gravel out good. If you want you can even fast your betta for a few days just so the worms ( Planaria) won't have any food and die off.

[labloverl]

Yeah, I've kinda been slacking on siphoning. oops! Just as long as they're not harmful and don't have to be removed right away! I'm introducing a new male (divided tank), and surely the new one wouldn't mind being fasted as well?

[LaLaLeyla]

Nah you don't need to fast them if you don't want to. If anything the bettas will feast on the little critters. :P

[labloverl]

Thank you, Thank you, Thank you for your help!! They really freaked me out!