Add Calcium to your DI water

[RuGlu6]

My RO/DI water is "0" TDS
Tap water is 13 TDS some times 15 TDS when its raining.
Tap water Ph 8.5 but as soon as in the glass and as soon as i start swirling the Ph probe the Ph goes down to 7.0 in 30 seconds.

RO/DI water Ph is 9.0(!) but with the same almost instant Ph drop down to 6.9 after ph probe swirling in the glass.

Did anyone else tested their RO/DI water Ph?
Or even better Ph INSIDE the water filter?

[viperfish]

Originally Posted by RuGlu6

My RO/DI water is "0" TDS
Tap water is 13 TDS some times 15 TDS when its raining.
Tap water Ph 8.5 but as soon as in the glass and as soon as i start swirling the Ph probe the Ph goes down to 7.0 in 30 seconds.

RO/DI water Ph is 9.0(!) but with the same almost instant Ph drop down to 6.9 after ph probe swirling in the glass.

Did anyone else tested their RO/DI water Ph?
Or even better Ph INSIDE the water filter?

What unit of measure is your TDS reading, certainly not PPM.

When you refer to the "PH drop", I doubt if the PH is changing that rapidly, most likely it is the PH probe stabilizing. Think about it for a second, PH changing from 8.5 to 7 in 30 seconds without any additives is virtually impossible.

[RuGlu6]

Originally Posted by medhatreefguy

What unit of measure is your TDS reading, certainly not PPM.

I think TDS (Total Dissolved Solids) is measured in PPM (Parts Per Million)

[viperfish]

Originally Posted by RuGlu6

I think TDS (Total Dissolved Solids) is measured in PPM (Parts Per Million)

I know how TDS is measured, I've never heard of 13 to 15 ppm out of a tap.

[Canadian]

Originally Posted by medhatreefguy

I know how TDS is measured, I've never heard of 13 to 15 ppm out of a tap.

TDS in the neighborhood of 9-25 is pretty much the norm over here on the west coast. It'll go up a bit when the municipality cleans the water mains or when there is a big rain that increases sediment as RuGlu6 mentioned.

[viperfish]

Now that is amazing! Your RO system must last forever. In Medicine Hat we are in excess of 200.