Water Hardness 498

[waterbear]

Where did you get a test reading of water hardness 498 ppm? It's sort of a strange number for a hardness test, even when a colorimeter is used. Is that for total hardness or calcium hardness? If it is total hardness then your calcium hardness might not be too high at all.

[CarlD]

Yes, if you drop test you'll get 490 or 500ppm, not 498.

Test it yourself to be sure.

[Phillbo]

It is Total Hardness.

I have to admit to allowing a Pool Store to test my water (i'm ashamed). I was going in to buy a new floaty chair and decided to take in a sample to calibrate my Salt Test . They use the test strips/computer system.

Other than adding a little Baking Soda for the TA the water is balanced. The hardness jumped out at me.

It was a new fill last summer and our city water is naturally hard. I guess I'll live with it.

[chem geek]

Your Calcium Hardness may be around 350 since it's smaller than Total Hardness which also includes the hardness from Magnesium. The actual ratio of Calcium and Magnesium varies by type of water source -- the factor of dividing by 1.4 that I used is based on a Calcium to Magnesium ratio of 4 to 1 (the hardness readings are in ppm calcium carbonate equivalent while the ratio is based on ppm of the ions themselves). In some areas where I live, the ratio is closer to 2.6 to 1 so the factor to get Calcium Hardness is 1.6 which would mean in your case something closer to 300 ppm.

The bottom line is that your CH is probably not far from where it should be.

Richard

[Phillbo]

Thanks all.. I guess if this is the worse thing I have to worry about then I should be ok.

A couple more 100*+ days here in Az and I'll be swimmin' soon