Frank, I have said this before, but many tag systems have came and went, but floy tag has been here for years. They are easy to use. I agree I do not put alot of sceince in results. However they can tell you about individual growth rates and are just plain fun. They are really only good on adult fish. They have cheap color tags, but the number tags are much more. They alos have several gun styles but I like the scissor grip myself.

Greg Grimes
www.lakework.com