Yes you can custom design your swimming pool. There are many local custom design swimming pool companies as well as swimming pool design software you can utilize.
According to USA Swimming and the National Swimming Pool Foundation there are 10 million Swimming Pools in the United States, with 360,000 Public Pools that stay open all year.
0.134 ccf per 100 US gallons.
Can't say unless you tell us how high the pool is.
82% of US households have access to the internet
I think there is about 17,000 swimming pool dealers, service companies, etc. There are over 50,000 pool stores in the US. There are also several distributors. There are many more online retailer and wholesalers as well.
Internationally, it is usually 50 meters, but in the US they have both 50 meter and 25 yard pools. In most places in the US, it is a 25 yard pool because the US measuring system uses yards. In competitive swimming, during the school year the 25 yard pool is used, but in the summer the 50 meter pool is used.
600 US quarts = 150 US gallons
It depends on the dimensions of the pool which, you have chosen not to share with us. There can, therefore, be no useful answer.
I think I did, I am a waterpolo player someone had mono in the pool, now two of us have it do far.
80million
About 1/3rd of all households have at least 1 firearm.