Hi there
First post for me, all the way from little 'ol New Zealand. First thanks for the great site - it has been really helpful while I get to grips with my new hot tub over the last month or so. The dealership I bought the tub from here promote an incredibly blunt approach to managing your tub - I presume because they want more sales by making it look like it takes virtually no care. Their approach could best be described as 'forget about chlorine measurements, and just use s@#tloads of dichlor'. After a couple of weeks of struggling with water that was either cloudy or very strongly 'chloriney,' I found this forum and got m'self educated. Subsequently, I bit the bullet and bought a decent test kit, and found out that the dealer's 'method' had me routinely letting FC fall to zero, and then shocking to an FC of over 20PPM with a CYA that had already risen to >400 (I stopped diluting at that point).
Anyway, thanks to the advice found here, a water change later I'm now getting along nicely using the dichlor/bleach method with nicely balanced water and a CYA of about 30.
The last step is to add borates. I couldn't find 'gentle spa' or an equivalent here, so have found some borax. My question is regarding adding acid to counteract the pH change - you can't buy HCl here so I'll need to use sodium bisulphate/dry acid 99%. How do I calculate the amount needed? - the poolmath calculator only has HCl/muriatic acid as an option for counteracting borates. And is that quantity of sulphate likely to cause an issue?
Thanks
Gray
First post for me, all the way from little 'ol New Zealand. First thanks for the great site - it has been really helpful while I get to grips with my new hot tub over the last month or so. The dealership I bought the tub from here promote an incredibly blunt approach to managing your tub - I presume because they want more sales by making it look like it takes virtually no care. Their approach could best be described as 'forget about chlorine measurements, and just use s@#tloads of dichlor'. After a couple of weeks of struggling with water that was either cloudy or very strongly 'chloriney,' I found this forum and got m'self educated. Subsequently, I bit the bullet and bought a decent test kit, and found out that the dealer's 'method' had me routinely letting FC fall to zero, and then shocking to an FC of over 20PPM with a CYA that had already risen to >400 (I stopped diluting at that point).
Anyway, thanks to the advice found here, a water change later I'm now getting along nicely using the dichlor/bleach method with nicely balanced water and a CYA of about 30.
The last step is to add borates. I couldn't find 'gentle spa' or an equivalent here, so have found some borax. My question is regarding adding acid to counteract the pH change - you can't buy HCl here so I'll need to use sodium bisulphate/dry acid 99%. How do I calculate the amount needed? - the poolmath calculator only has HCl/muriatic acid as an option for counteracting borates. And is that quantity of sulphate likely to cause an issue?
Thanks
Gray
