Hi all, I am new to this forum and hoping someone can give some advice. My family has a 75 gal. freshwater tank. We have three tin barbs (others too) and a few days ago I noticed one of the barbs was a lot bigger in the lower part of her. She has continued to get bigger. She eats fine and swims fine, although today I noticed she starts to float up some when she not moving. I only saw this happen once. I assumed it was because of her increased stomach size. She looks pregnant, but this is not supposed to easy to do from what I have been able to read. Does anyone have any experience with this? What I should expect, etc? Any help would be appreciated.