Hy, I have a 55 gallon tank with 2 oscars, 1 African cichlid and 2 gouramis. I've been looking some strange little white worms that some are on the glass and others are just floating all around my tank.
I would like to know what are they and what can I do to eliminate them.
thanks

sounds like planeria to me, maybe flat headed worms. Basically, they are free swimming parasites that get into your tank on live plants, live Rock etc. Even though they might look unsightly in large numbers, they won't cause any harm to your fish. Elimination it can often mean stripping the tank down completely including filtration. They thrive very well when you overfeed. Try harvesting them manually and cutting down on the food for a while and see what happens. Some people reckon that copper-based solutions will kill them, you got to be very careful using this type of substance, some fish don't like it

stepping up water change frequency, getting in the gravel extra well, and making sure to break down the filters and clean inside of them well (with tank water) will help a lot as well.

OFL, when you say it may be because of live plants or rocks, non of my plants have been bought! I got some bulbs at wallmart so i dont think it may be because of them as they grew on my tank! can it be because a driftwood?
Thanks! ill try! if not! ill try stripping the tank off!

hey guys! it seems I found solution for the planeria...
I googled "planeria" and found a forum where they had this same problem! and they recomended to add salt (instant salt water) and I did today! since i addit ive seen les of them on the tank.

I have never had these worms but they thrive on excess food. The fact you have loads of them means you are overfeeding. Only feed what your fish will eat in 2 to 3 mins and no more no matter how much they beg. Oscars are professional beggars