Starting water treatment

[minesapint]

Hello

Earlier on WallyBrew mentioned you had a hardness figure of 119.3 and not 91.5 Ca mg/l as you thought.
WallyBrew did not mention how he calculated it, that can be frustrating when trying to puzzle out what is going on around you.
I got the following equation from the Anglia Water site a while back. They appear to have given the site a bit of a makeover and I cannot find the information there anymore. Could still be hidden amongst the bumf on there.

Acknowledgements to the old Anglia Water Web Site.
To calculate the total hardness of the water, the quantity of calcium and magnesium salts present in the water is found using the following calculation.

[ (mg/l Calcium x 2.497) + (mg/l Magnesium x 4.188) ] x 0.4 = Total Hardnessof the water as Calcium in mg/l.

wich can be seen on the detailed water report as TOTAL HARDNESS ( as Ca mg/l )

TOTAL HARDNESS (as Ca mg/l) x 2.5 = CALCIUM CARBONATE (CaCO 3) mg/l

TOTAL HARDNESS Ca mg/l x 0.174 = DEGREES CLARKE ( or Grains per Gallon or English Degrees).

The last line is only for the sake of completeness. I do not think anyone uses any of the units mentioned in the last line for brewing.

When you put your Calcium 36.66 and Magnesium 6.64 into the equation then multiply the answer by 2.5 it comes out at 119.3 as per WallyBrew s result.

Now you know a bit more of the "how and why" but I must admit that I too leave the hardness box on Graham's Calculator alone.
But you can have a play at working out and entering that extra bit of info into the calculator. A little less in the dark.

If WallyBrew has a different equation I would like to see it.

Cheers all.