Is this to tell F1's from Fla or just so you know they are oldest fish?
Sorry I see now, I wouldn't do anything personally because they should always be the largest fish. And you wont really know which ones you need to cull for a year or two, by that time the fin may have grown back.
But need to get answer from expert!
Last edited by jakeb; 10/21/12 10:12 PM.
