I had a hell of a time keeping kribs in a 55 gallon community tank in years past. I have recently gotten back into the hobby as the result of inheriting a single male betta. Now I'm looking at a 15 or 20 gallon tank that I'm planning to use solely for a breeding pair of Kribs. I consider Kribs my favorite aquarium fish, but they can be extremely aggressive. I have seen them beat faster, larger dither fish to death. I used to read that it would be better to have two females to one male, but never had luck with that setup as one female would get beaten to death. Though it is fun to see the females compete for attention. I have been getting my confidence up by reading more information on the breeding of Kribs. I will most definitely have my tank planted with a lot more plants than my other attempts. I did get one of my pairs to lay eggs on a couple of occasions, but every time they were eaten by either the Kribs or their tankmates, I never knew who. Why I had so much trouble in a large tank that was lightly stocked in the past (if I recall I had 3 or 4 2+" danios of some variety, 3 otos, and the kribs), I don't know, but I have a lot more knowledge now.