Pondboss made a video about catfish in a smaller pond. He suggests not breeding them so you can control the population.
Catfish will breed in a small bucket.. here is a video of cajuns catching catfish in buckets but also shows how and why they use buckets good watch.
https://www.google.com/search?ie=UTF-8&client=tablet-android-samsung-rvo1&source=android-browser&q=catching+catfish+in+buckets#fpstate=ive&vld=cid:1bcf4d88,vid:pWyE-l7C9PA,st:0
