I actually look after them for idiots that install them for rentals.

No1 - Use bromine because it smells less than chlorine

No2 use multi bromine as it has anti algae and anti foam in it

No3 keep the pH correct, about 7.2 to 7.4, same as pool

No4 clean the filter every week

No5 kids love hot tubs, hot tubs HATE kids

No6 FUCKIN SHOWER BEFORE YOU USE IT YOU DAFT CUNT NO WONDER IT TURNED INTO FUCKING SOUP FUCK ME