Water hyacinths and water lettuce are tropical plants that you simply toss in your pond. They float on the water and multiply quickly giving your pond surface coverage. The surface coverage protects your fish from predators and their roots add oxygen to your pond. Your fish appreciate the extra oxygen and the more oxygen in your pond, the less algae!!! Win, win, win. We regret that they are only available for pick up in our store. $5 each. We will have them available now thru the end of August. We are open Tuesday to Saturday, 9 am to 5 pm.