So I’ve read about adding borates to spa water as an additional buffer to help stabilize TA and Ph as well as make the water feel softer. So my plan is to add 50ppm using the pool math app. My spa is a 375 gal Caldera that I sanitize using the 3 step bromine system. I wanted to use Boric Acid instead of Borax to avoid changing the TA very much. What I found available locally is “Enoz Roach Away”. According to the label it is 99% boric acid and 1% “other”. Is this the stuff I want to use. I just wanted to seek some advice before dumping a bottle of roach killer in the tub ??? Thanks!