Last Thursday when I was playing golf at Havana, on the Par 5 #3 hole behind Colony Plaza there is a small pond and they were working on the island. About six people were wearing waders and had pulled the island up to the bank and were taking the old plant trays off the island and putting new ones on the island. They left the plants in their tray, which were about 3' x 4' and put them onto the island. Apparently the water can reach the bottom of the trays and it's sort of a 2-way street. The plants receive water and help to purify the pond and keep algae away. On the side of their truck, I can't remember the company name, but it said something to the effect 'keep your ponds and lakes clean of algae with artificial plant islands'. It looked something like this, but with flowering plants.
