Way off topic I know but I'm a bit out of my comfort zone.

BD I am not familiar with this set up, all the pools I've had have had chlorinators, I did Google your system out of curiosity and found this below.....I think once you get a handle on it you will be right.

Yer been taking water samples into pool shop 

I reckon that stabilizer is just a money spinner for the pool shops, I used to use it all the time when I first got the pool (50 thou liter), cause they said "you need this", it's expensive shit in the doses they want you to use. I haven't put a drop of that shit in for 7 years, just run my chlorine up high and adjust how many hours a day it runs for depending on the temps at that time of year, never had a green pool ever.

yeh same mate .. pool shops piss me off .. always tell me i need about $200 worth of shit .. so now i just throw a couple of bags of sale in every now and then , plus some acid , and then a kg or 2 off chlorine and its crystal clear all the while now. and yeh that bunnings salt did the same to my pool as well so dont buy that shit.

Yeah Soapy, I have a saltwater pool, I add about 600ml of acid each week and have the chlorinator up near max in the summer for 7-8 hours a day.

SB Its copper ionised filter and the lowest setting is 25 % I ran it at fifth % and dropped a pill in the filter basket every 2 weeks over winter

I know nothing about your copper ionizer as mine has a salt chlorinator ,but I do know not to touch any salt from bunnings or the larger grained salt as its dirty and as others have said will stain your pool. I have noticed that all the pool shops around here only sell salt from china,no one seems to stock any aussie salt.

For fuck sale Bunnings salt must really be shit 

remember guys, Bunnings don't pack it, with enough complaints, they can go back to the supplier/maker