sick betta-white fuzz

Question
I have had my betta for about a year and a half.  He has been in a wall hanging bubble tank and about a week ago i bought a new plant for him recommended by a pet store.  Since then a whit film coated the top layer of the water and yesterday i noticed that he had a white fuzz coating all around his middle.  i used a salt water solution and put him in new clean water in a bowl but now he is not eating and is lying on the bottom of the floor.  He is loosing his color and i think he is dying what should i do?

Answer
Hi Laura;

It sounds like Columnaris. He needs an antibiotic. Here is a web page about it;

http://www.mushi.petfish.net/columnaris.html

The white film on the water is probably unrelated, but clean it out and rinse everything to be sure.

I hope he feels better soon.....

At Your Service;
Chris Robbins