Hi all
I was just doing some figures from scratch for a new spa we're getting and my figures never agree with those from all the pool calculators around, the figures just do not match, the error seems to be in all cases regarding CH that none of the pool calculators take into account that calcium is only a percentage by weight of the total.
for example: CaCl2.2H2O - cal flake is 147g/mol but only 40g of that is actual Calcium, so all the calculations I get are out by a factor of 2.5 . Where am I going wrong? Or are all the pool calculators wrong?
Thanks