I think the key to breeding is to understand the natural stimulus of the fish, there are some really that would eventually needed to be in pond like ofcourse Huge catfish, but it's seems feasible with this vid aroundactually.
Like knowing the breeding season, sudden changes in the water (big part actually), feeding live feeds or they just don't get a partner because they're so very sensitive they need special care and pricey, good example are tigs... Once I move argh I'm gonna spent time breeding this oddballs as well... Bucket list.