My apologies for the late reply. I tried doing methylene blue bath on a separate container (30mins) for a total of 12 days and it worked. The white spots disappeared but I'm still concerned since my main tank could be infected too. After adding her back in the main tank she's still stressed and keeps on glass surfing. I noticed that there's a pattern when she's glass surfing.
I am currently cycling my 10 gallon tank. I just learned about the cycling process after I bought my fish. She's with 2 neon tetras (added them first in my main tank then introduced my betta after a week) and water sprite plants. Im planning to add more tetras after cycling. I added 2 indian almond leaves just to darken and soften the water. I'll be removing the leaves after 2 weeks. I only added the plants including the IAL during the second week. I never used additives aside from anti-chlorine (for the water changes). The temperature is at 80°F.
I do 10% water changes after 2 to 3 days. It's been 2 weeks since I started cycling. My neon tetras don't seem to have any problems though. There's also a white thing growing on my plant's wrap. I first found this white thing on my air hose attached to the filter but I removed it. As for the other details, I still can't provide since I don't have a freshwater test kit yet