I was wondering if you could have a lower level of Borate of say 30PPm and still get some benefit?
I was calculating amount of Borax to add for 20k pool to get it to 50 PPM and came up with 74 pounds or 16 boxes (76 oz). Plus 4 1/2 gallons of Acid. YIKES!!
So would 30PPM give you any benefit? Where did the number 50PPM come from?
Could you add borax and acid over several weeks to get level up to 50 PPM?
I just think I may have hard time going to Walmart or Home Depot and buying 16 boxes of Borax.