Wow, the size difference is substantial. You are getting good growth out of the bigger 3. My 2 are growing more like your smaller 2, around 10-11” now. I did get my 2 from Charles about 1 month after you received your 5. I was hoping for 1” per month, but not getting anywhere close to that. In February they were around 8,” so 2-3” in 4 months is not what I was hoping for. Being in a pond with other fish competing for the food is likely why the growth has slowed. They are still very skittish and spooked when other fish come to get the food and even dart away when I drop the food in.