Who Gives A Fish Forums

I'd be careful with that stuff. Herbal meds can be sketchy, especially for bottom dwellers like corys. What's the active ingredient? My 29-gallon has a group of Sterbais, and I've had better luck with Prazipro. They're sensitive to meds, so I always cut the dose in half.

Definitely Female, 100%.

Males tend to have less vibrant colors even when they're in breeding mode.
The dorsal fin on a male is typically pointed, whereas this one isn't, and the tail fin is more like the spade symbol on a playing card.