Answer: Stocking carp rates are 15 to 20 grass carp per surface acre, but this depends on the amount of vegetation. You can go slightly higher, you can go slightly lower. 15 to 20 grass carp, eight to 10 inches long, eight to 12 inches long is the normal stock rate. Again, it’s dependent on the amount of vegetation in a pond. You need a professional consultant to give you an idea for that.