The first time my betta started to develop a somewhat ragged looking fin, the pet store suggested i use this. It seemed to work pretty well.
Months later, however, he developed a cottony looking patch and I was told to use this again. I did, but it didn't seem to work very well.
Unfortunately, my betta eventually passed away.

Pros: Easy to use

Cons: Not always effective

this is what every beta lover needs inn their tank

Pros: helpful

Cons: n/a

This product works well, I am using it on my sister's fish right now. The only bad thing is that it doesn't list the diseases it treats.

Pros: Works well, easy to use

Cons: You can't be sure what it treats