My baby fighter tank seems like it's got a fungus going around in it. They get white patches on there body and the their fins clamp up and look like they get all shredded and then they die. The platyys in the tank look fine it's only tyhe fighters. What can I do? Please help aas I don't want to lose any more

that's horrible Cam...a real pity. Fungus is usually secondary, go to your LPS dose the crap out of your tank and do daily water changes. Would be easier to dose if you drop your tank's water level - if it looks like it's proceeded too much you should euthanase...

What should I dose it with?

You need to figure out what caused the fungus. Could be a wound or bacterial infection. If bacterial, treat with an antibiotic to fix the infection, and an antifungal to treat the fungus. If it's a wound, I'd say salt, and antifungal.

Now I'm not sure it's a fungus. I've got a breeder trap in there and the fish go between the glass and the trap and just sit there untily they get white patches then their fins clamp up and they die.

A picture would help.

Maybe you should dose first with furan 2 then move onto treating the fungus?? I only have metro and prazi so I can't help you much

How many have you lost?