Fin Rot

[Imagine]

Hi, I'm a new member here and just wanted to mention how much I enjoy this forum:)
Anyway, my sisters bettas have had fin rot for about a month now, and aq.salt doesn't seem to be working. We might be stopping by at petco tomorrow, and I was wondering if there are any good medications for fin rot there?

[ChoclateBetta]

Copper but daily water changes are a must what is the PH Temp tank size water changes.

[Imagine]

Um it's a divided 5 gallon (we might move them to something smaller to make it easier to administer meds though), the temp is around 80-82, and I don't have a test kit yet. What percentage of the water should we change every day?

[ChoclateBetta]

As much as possible 25 to 50 percent finrot is caused by bad water quality.