Kribensis free to a good tank

I have a pair of adult Kribensis (male and female) that are in need of retanking. My tank is no longer big enough for them and, being quite territorial, I am having occasional issues.

They can be seen in this short YouTube clip keeping close to the fry they spawned in my tank:



Due to 'natural selection' most of the fry did not survive, but I do have 2 that have grown to around an inch long now. These could also be retanked although this is less urgent.

They look pretty cool! Are they coldwater or tropical?

Tropical. They look awesome but they don't like sharing the tank with my Keyhole Cichlids and they have an issue with one of my catfish...