u/Halfmacgas

First time keeping rainbow fish, picked up a small school of 6 Kali tawa (4 boys and 2 girls) from LFS. I put them in my planted high tech tank with a few Corydoras and tetras. They don’t seem to be the happiest campers - hiding a decent amount, not swimming aggressive at feeding time.

I read they might not like CO2 and subsequently lower O2 levels. Has anyone done it successfully ? Any tips / tricks ? Maybe they just need a little time to settle in, or maybe a bigger school ?