As most of you know I've got HBG in my pond with my original F1's now 4 years old. I do have a small number of Fx's in there. I will be watching these closely to see what they do in terms of growth. One problem I have however is telling which fish are Fx's. I assume the largest fish I catch are F1's which are 9 to 10 inches. But when I catch a 8 inch fish, or a 6 inch fish what is it? I've caught every length fish in my pond from 10 inches down to 4 inches. I don't think any of my F1's could still be 4 inches long could they? Without assuming a growth rate I don't know how to tell one from another.
