Swimming pools blog

Hello,
Newbie here - so pl forgive asking basic questions.
Q1 - I have an above ground (H2O) pool - steel sides/vynil liner and
it’s 12ft diameter - 3 ft deep.
How often and for how long should I turn the pump on ?
Also - someone suggested that a floating chlorinator is all I need ?
Just take it out when using the pool.
I read elsewhere they are not recommended for vynil pools - should I
stick to starter kit of chemicals , or use - the “all in one”
floating chlorinator ?
Q3 - is a 3kw heater worth buying and running ?
Thanks
Matt - brighton