beta fish looks like he is getting all puffy blown up

Question
HI Chris,
 We have a this beta fish for over 2 years now,  we change his water every week to week and a half.  In the past few days, he looks like he is getting all puffy like he is getting blown up.  What would that be?
Thanks for any help,
Carla

Answer
Hi Carla;

Poor guy. He could have dropsy or simply be constipated. Here are links to good articles on both;

http://badmanstropicalfish.com/articles/article24.html
http://www.mushi.petfish.net/constipation.html
http://www.mushi.petfish.net/dropsy.html

I hope he feels better soon......

At Your Service;
Chris Robbins