Sure way to kill your Pangasius so. is Methylene blue. Don't use it on this fish or any scaleless fish for that matter. Best to us a salt treatment. I mean don't make the water saltwater just add some salt like you normally might do. Not much you can do with this fish with fungus. Just hope it gets better. I don't think its fungus though without seeing a picture. Might just be dead skin from constant rubbing.
If you look closely here you can see the stuff on the net, when i rested the net on the top of my tank so he could swim around in the net in the water while i got my camera ready he was swimming against the abrasive net which removed some of the fuzz. Note how it looks in the water.

Below is a picture of the stuff after i put the fish back in the water. It looks like slime out of water with a gooey consistency, i didnt touch it.

Here is a picture of his mouth, unfortunatley most of the stuff came off when he was rubbing against the net, but you can still see a sore, and maybe a little bloody look but i havnt noticed any actual bleeding. There is also some of the stuff still on him.

Here you can kind of see some of the stuff hanging off of his mouth.

You can see how it actually protrudes off of his head/mouth and is clearly visible something isnt right.
WTF is this, i am new to fishkeeping and i had a tank when i was younger when i didnt know anything at all about aquariums, i had a fish die from a substance like this that grew all over his body, probably because i didnt know how to take care of a tank. I tried to take the best pictures that i could, but its hard to take a picture of a fish that is easily scared by any movement outside the tank, and its hard to hold a camera and take a pic of a fish out of water, especially a juvenile and fragile fish like this.
