So the guy at the lfs said that i should put my betta in a separate container for two weeks while the tetras are alone in the tank, then add the betta. will this work? Oh yeah, and the bettas glass container is in the tank, so the water will be warm.
Yeah, but I got all the fish on the same day, and put them in at the same time, after acclimatizing them of course. But the bettas container is in the tank, and he can see them. I'll leave the lights off from now on until they ar together again, as per another members advise. So should I wait until this weekend?
You can release him, it isn't necessary to wait that long, unless you were quarantining the fish. What I do when introducing new fish is I keep the light off the first day they are swimming together. They can still see but it is dim light.
So you can release him right now, and then leave the tank light off all tomorrow.