I am sure you have probably read this on this site but be watchful of your pool water chemistry, especially next year in the spring and early summer, if you are using your Nature2 with solid chlorine and the mineral cartridge. The mineral cartridge is best to never be used and the solid chlorine only when you are on extended absences from your pool.
The ozonator you can leave plugged in but when it requires any maintenance I would not spend the money. They are not applicable to outdoor, residential pools.
Take care.