Quote Originally Posted by john_s View Post
Thank you Mark! What a job!
If I have 8-mol sodium metaborate instead of 4-mol, and if I adjust for the molecular weight (x137.88/101.83) would the extra water of crystallization make much of a difference to the longevity of the concentrate? I don't need stupendous life: 6 months would be fine.
Hi John,
As Alan just posted, 8-mol will probably last long enough, especially if you keep the concentrate chilled or frozen.
But if you use 8-mol, don't forget to increase the amount of concentrate you pour out when mixing.

Thanks for the kind notes. They're encouraging. Yes, I try to write clearly, even though I'm a software geek by profession.

Mark Overton