How much is the TDS increased if Borax is added to 50 ppm

[chem geek]

Any results Chemgeek on your trial with "Jack's stuff", reference post

http://www.poolforum.com/pf2/showthread.php?t=2771 ?

Neither of the two places that Jack's told me would have their stuff truly carried Jack's Magic. So I either have to order directly from Jack's or just use what I believe he is using which is an oxidizer (probably sodium perborate, but I'd rather use potassium monopersulfate) followed by a dry acid (probably sodium bisulfate). The weather is getting too cold to swim now so unless we have another warm spell (doubtful) I'll probably wait until spring before doing anything about this.

For now, I'm just going to measure my CYA and see how it does over the winter (to see if I get the same drop as others report -- I'll measure my calcium as a proxy for dilution rates).

And congratulations on the success using the borates. It would appear that it does take over a lot of the algaecidal usage away from chlorine while also acting as an additional pH buffer. I plan to add salt and borates to my pool in the spring.

Richard