So... quick question. I found a local supplier that sold me a 50 lb bag of what they said was granular boric acid (great deal at $47+tax). The bag itself was even labeled as Boric Acid.
I only needed 35 lb for my 15,000 gallon pool, which I added this morning. Before adding, TA was 80 and pH right around 7.6. Four hours later, TA is up to 100 and pH jumped to 8.0.
Is it safe to assume what they gave me was actually borax??? From what I have read, doesn't seem like boric acid should be able to have such an effect.