Who Gives A Fish Forums

Totally agree. Overfeeding is a common mistake. I usually feed mine a small amount twice a day, and they're doing great.

That's a solid routine. Corydoras appreciate clean water, so keep that up. Also, make sure you're feeding them sinking pellets or wafers. They're not great at competing for food at the surface.

I've had mixed results with bettas and Corydoras. Some bettas ignore them, others chase. Maybe add the Corydoras first and see how the betta reacts before adding more.

Yeah, slow acclimation is key. I've lost a few Corydoras in the past by rushing it. Now I always drip acclimate for at least an hour. What's your water temp?

I agree with haply. Six is a good number. They'll be happier and more active in a group. Just keep an eye on your water params, especially nitrates, since they can be sensitive.