We are looking at purchasing a home that has an in-ground swimming pool with a deck built over it entirely. It still fills with water. It looks like previous owner siphoned the water out to water their garden. I like the idea of built-in water supply on hand. Does anyone know how you'd keep it from becoming a mosquito haven though? Can you buy those fish that eat mosquito eggs and dump those in? Chlorine? I've never owned a pool...so cost estimates would be good for any method of mosquito prevention. It looks to be about a 25 foot by 15 foot sized pool thanks.