The water here is very soft. I had the fish couriered up by APC and as usual they arrived late, about 1400 so the fish was floated for about half an hour and during that time I just put small amounts of tap water into the bag, he was totally fine. I just use tap water, dechlorinated of course, for water changes.
The other 3 typhoons came from a hard water area and they were transitioned over a longer period but again no issues and if I remember all of them fed straight away without issue. I collected the three small ones so they weren't in a box overnight. However when I collected the first one it was freezing and snowing but they seem quite Hardy.
I had a shoal of cardinals which I had to remove because they were nipping the typhoons tail extensions. I worried about that so moved them on. Now they share the tank with a sole severum which is a pet like a pet dog really, loads of character.
I'm quite sure your typhoon will be fine.