Borax test?

[waterbear]

I use the AquaChek borate test strips...IMHO, they are accurate enough to determine if you have 30-50 ppm borates in the water and they are pretty inexpensive.

[halefmly]

Thank you, Evan. Your thread on "the great tetraborate experiment" is what prompted me to post the question. Like you, when I used the borax I noticed a silkiness to the water and a bright sparkly appearance.