I might need to remove the cories if they can't live in hard water. I already have 3 guppies (male) and 2 swordtails in my tank since I bought them when I was very inexperienced and didn't know better.
I'm not sure about two female swordtail. My experience years ago was they're very aggressive. With guppies I would go all male or you could have been fry every month.
But a group of male guppies is lovely to watch.
What's your tank dimensions? That impacts recommended fish as well as your GH/Hardness.
The cory is ok in hardness up to 268.5ppm but they need a tank base of 18" length x 12" x 12"
Yeah I think my tank is large enough, I'm using equilibrium to bring the gh up to 10 at least. I checked my kh with different tests and it gave results from 3.5-5 dkh so I'm not sure exactly