there not worms they are some kind of growth like algae
ive got loads and it only grows on the part of the tank that has a strong currant
an algae eater will eat it
Sounds like planaria usually result of high nitrates from lack of cleaning and/or overfeeding. Their no nuisance to fish for the most part just preform more water changes and make sure all food is eaten.
Probably planaria. They're harmless, but they can be annoying. They come when there's an abundance of excess food in the tank, so make sure you cut down the amount you're feeding your fish. Fast them for a few days, the planaria will die off.
