Pool Cleaner

Pool Cleaners are just like Lawn Mowers, except they are for the pool. They can be purchased from Crazy Dave in his shop for $1000. If they are not, the Lawn Mowers that appear instead will only stop any zombies that are out of the pool, as they sink once they fall in the water. When a zombie tries to go up to the player's house, the Pool Cleaner will activate and suck all the zombies in the lane down the funnel sticking out of the water.

Gold Coin
You will get 1 gold coin from every pool cleaner left like Lawn Mowers and Roof Cleaners, so investing $1000 in them is a good idea in the long run.

Trivia

 * If this is not bought and a zombie gets to the end of the pool, a lawn mower will fall in the water and create a cloud of smoke, killing only one zombie.