Worms????

I have 3 Veil Tail Oscars and one catfish in my 55 gallon Aquarium.. I just got through feeding them and I noticed little squiggly lines in the tank swimming around. At first I thought it was some junk floating in the current but after I turned the filter off it was STILL sqiggling around.. there are about 4 or 5 in the tank (that I can see).. I have no idea what it is or how or if I should treat it. My fish look healthy.. they have a great appitite.. The only thing I can tell you is that the "worms" are red in color and very thin and small.. HELP what has happened.. I am in a panic.. I called the guy at the local fish store and he just suggested I take some water out of my saltwater aquarium and put it in my fresh.. I understand the logic but will it kill it.. he had no idea what it was he just had a suggestion on treating it (useless to me) Please Please help before I freak out!
Thanks in advance!
Lyn in Alabama

Thanks for the reply.. Here are the answers to your questions...

have you/ do you feed any kind of frozen worms, have you bought any new plants recently

I have only fed my fish floating pellets with the occasional goldfish or two. I dont have any plants or anything in the aquarium so that the fish will have the most swimming room.

but nothing that has harmed my fish in most cases once the fish saw them they were eaten. Your oscars will probably rid the tank of the problem as soon as they see them.

I thought that too but I think these things are way too small for them to even see them... That's why I didnt even try to get a picture because you have to really look for them to see them.

I hope a 125g or a 180g is in the near future plan with three oscars.

I thought about it after I posted that I should say something about that... we are building a house and our new house is going to have a 300 gallon aquarium build in the wall just for the big babies.. I gave up alot of fancy molding so they would be happy.. I'm sure it will be worth it.