Newbie, buying pool in near future: questions

Hello,

I am new to buying a good quality above ground pool.

As far as the equipment I see that the pool frog leap system keeps your water nice and clean.

Do I need to purchase a sepperate chlorinator with that?

How about chemicals, other than the cartridges for the frog leap system?

How about a sand filter pump?

I am trying to find out what equipment I really need to get my pool up and running and keep it nice clean, the easiest way possible.

Also, is a 25 gauge liner good?

Thanks for any advice you have.