Never buy a house with a pool, it doesn't matter if your wife or child thinks it's a good idea or if your real estate agent tells you it adds value to the property and if you do make sure you get in writing that they are willing to clean the damn thing other wise you'll will spend large amounts of time topping up water levels, checking the chemical balance of the water and cleaning all sorts fishing all sorts of crap out of the water.
The thing is it rarely gets used and I personally aren't into swimming at all so why is it I've got to maintain the damn thing ?