I have a large amount of Amazon Frogbit available. Selling $10, and massive $20 bags. You will get much more per portion than you would at your local fish store.
Free of duckweed, pest snails, etc.
Floating plants are great for soaking up nitrates and keeping the aquarium clean and safe for fish. It also provides shaded areas for fish to relax, and provides cover for fry to hide in and more safely grow up. Also it looks great!