Swtiched from chlorine tabs to SWG in late March. While using the tab feeder and getting water tested at the pool company (I now use a Taylor K-2006 kit), their "computer" output always suggested adding 2 oz of Biogard Algaecide Preventer and a quart of Biogard Scale Inhibiter per month. Now that I have a SWG, the recommendations are about the same, but using their SaltScapes line for salt pools. Looking at the material safety sheets, there doesn't seem to be much, if any, difference in the chemical makeup of the products.
So, my fill water CH varies throughout the summer, but averages about 150 ppm. Pool test measurements indicate CH between 250-300 ppm. The questions are: is it necessary to add various "inhibiters or preventatives" throughout the summer...and, if so, is there really any difference between chems for chlorine and SWG pools??