Pool Cleaners are Lawn Mowers for pool lanes. They can be purchased from Crazy Dave in Crazy Dave's Twiddydinkies for $1000. Otherwise, regular Lawn Mowers only stop zombies that are out of the pool, as they will only destroy the zombies in front of them for a short distance due to the lack of waterproofing that would have otherwise rendered the pool cleaner redundant. When a zombie tries to exit the pool to enter the player's house, the Pool Cleaner will activate and destroy all the zombies in the way.
The sound a Pool Cleaner makes when it moves across the pool.
If the player looks closely, they can actually see that this item swallows zombies.
The reason it costs $2000 less than the Roof Cleaner is because there are only two pool lanes.
Due to being a defense item, the Pool Cleaner can't suck plants.
The "trickedout" code will not apply to this item, as they are not Lawn Mowers. It shares this trait with the Roof Cleaner.
Unlike the lawn mower and the roof cleaner, it doesn't simply destroy the zombies. As it sucks them in, the machine will be unlikely to have such a large capacity to hold whatever matter consumed, so most likely after being processed they'll sink to the bottom of the pool.
Additionally, the pool cleaner indicates that the pool's depth is very shallow due to it's size and the fact that it has wheels - A floating pool cleaner will not need these.