If there's anyone in Cardiff with a fish tank I have 2 adult breeding pairs of Kribensis. I have 3 pairs in my tank, and only the dominant pair is able to breed. Give these guys a cave, and some plants, and they will breed for you.. as long as they are the dominant pair in the community. I get around 50fry every 2 months, which rarely survive, due to being in a tank with rainbowfish who tend to eat them. If in a tank of their own or with small fish, they could probably rear them.
Anyway, like I said I have 2 pairs that are free to a good home, ie. someone with a tropical fish tank.They are not large fish, I keep them in a community without much trouble - but you do need space for them in a community tank, as they are territorial and will very jealously guard their cave. They do need a dark cave to feel comfortable and to breed, something they can slip inside.
I can deliver locally across Cardiff free of charge or welcome to come and collect.
Giving away due to no fault of their own - simply that my dominant pair needs more space and less stress and the other 2 pairs are not being let in the cave or getting any love, aww bless.
I know it's probably not the best place to list them but figured I'd give it a shot - you never know.