So there were Rosy Reds that lived with Brixie for the last 3 months just fine. I just moved and refilled the tank with hose water, and kept Brixie out because of having to wait for the chlorine to evaporate. I decided to put the fish in early and they were fine at first. I put them in the tank at about 8 PM last night. This morning, they were all still alive. I just got home from school and they are all dead.
I guess I'm just worried because the fish survived 12 hours through the night but then pop on 12 more and they died. It's had 24 hours to sit and filter, is it okay for me to put Brixie in now?

