These fish are PURE ABSOLUTE EVIL.
I moved mine to a small coldwater tank because of the evil they were unleashing on my tank. At 2 inches they were chasing my corydoras and going for my tiger barbs sides.
If you have a really big bucket, you can fill it with cold water (these fish happily live in anything over 15C) and put in a few hiding places, then put the fish in. You could get a small filter to just keep it clean, or you can just take it into your bath and run the water straight into the bucket for 5 minutes every week, essentially doing a 100% water change.
I'm sure there are people who haven't had problems, though I expect most stories of success with them are actually mistaken siamese algae eaters.
these are tropical fish!!!!!!!!!!!!!!!!!!!
they may survive incold water and do not! live happily in it!
please dont give advice like this, as these are tropical fish not coldwater fish
and a bucket is no home for any fish !!!!!!