...like Dri Diver
Yes there is, although it doesn't get down below the surface as far.Take an empty plastic soda bottle with a cap on it, and use plastic electric wire ties to connect it to an inexpensive squeegie purchased from an automotive store used for washing windshields. The type that has a squeegie on one side and an enclosed sponge on the other side. They have screw threads to put onto a broom handle. Either get a broom handle or use your universal boat hook.The rough enclosure for the sponge side wipes the hull, and the bottle floats to keep upward pressure. Cost is very attractive, you can buy ten of these for the cost of a Dri Diver.It won't get down as far as a Dri Diver, and most likely won't get your keel, but it gets the first few feet which is where a lot of the critters start growing. It works great at the bow and stern, not so great, or deep, amidships.We have the bottom done by a diver only every three months.