When I started in this hobby in 1974 the tinfoil barbs were small plain silver fish sold in every shop and we knew not to buy them for our 3ft tanks as they were said to get big and eat your neon tetras!
This thread puts them into a whole new light. They are very beautiful and (I believe) graceful. Its always good to see fish reach their potential beauty and size. Congratulations to you. You've done well.