I have a 150 and most desjardini that come here are about 2-3 inches in size, max 4 so I can I not keep one until it gets about 7-8 inches and then swap it out with another smaller desjardini? How long will it take for it to grow that big?I always just kept the desjardini, much more attractive fish to me. Agree that they can be aggressive. Mine would even go after my arm. Not a fish I’d recommend to all but the large tank owners. Even a 225 is too small for a fish that can easily get to 12”.