To get more bang for your buck, after you remove your harvest ... but definitely do the supplement do this before temps are too cold. If there is a big difference in water temp of your transport water and the pond, acclimate them to temps. You could do it in steps. Take out 15 lbs ... supplement 15 lbs ... repeat ... repeat. Do the best you can as temps are going to be cooling fast now.

It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers