Well, my grandma doesn't like having a tank for one fish, so she let me set up my ten gallon as a little sorority.
We could only put in three because our petco seemed to be almost of of females.
We got a purple one that was "for adoption" and a black one that was just there, and we already have one female that used to be my cousin's but was living in a tiny tank.
My grandma didn't tell me that the fish she already has might have SMD, and isn't looking so great. I have her a salt bath and her colors went almost back to normal (she was a red cambodian when we got her, now she's more of a charcoal and red color). She looked 100% so I waited a while and put all three in because my grandma didn't want to wait too long.
The purple one was a little aggressive at first, mostly towards the other girl we got from the store. After a while, they calmed. Now, the cambodian has darkened again, is torn up and is acting odd again. The black one is hiding and the purple is chasing them both around very aggressively. I put them all in cups until I decide what to do.
Any tips on what we can do? How can I treat the cambodian and is there a way around the agression?