i have 3 guppys in a 7 gallon tank along with 2 other fish in it. One of the guppys that has always been smaller than the other 2 has recently been showing some signs that one eye is very slightly bigger than the other and has a little bit of white around it. I did some research and it seems it could be pop eye, but im not sure and am curious if it could be something else

any help with a diagnosis or treatment would be greatly appreciated!

Eye Problems
Symptoms: Cloudy cornea, opaque lens, pop eye, swelling, blindness.
Cloudy cornea can result from a bacterial invasion. Antibiotics may help.
Opaqueness can result from poor nutrition or a metacercaria invasion (grubs). Try foods with added vitamins and changing the diet to include variety.
Pop eye (exophtalmia) can result from rough handling, gas embolism, tumors, bacterial infection, or vitamin A deficiency. Gas bubble or bacterial infection can be treated successfully with penicillin or amoxicillin.
Blindness can be caused by poor nutrition or excessive light. Lowering the light level and a change of diet to include lots of variety may help prevent it. ~~ animalworld.com

here's the link:

http://animal-world.com/encyclo/fresh/i ... es.htm#Eye Problems


just scroll down to eye problems/ pop eye