Curious if anyone here can answer this question... I've seen it posted that concentrated H2O2 is used as an oxidizing shock for Baquacil pools. However, I've also seen that sodium percarbonate is used as part of the BAQ-->chlorine conversion, implying that the sodium percarbonate reacts with the Baquacil. However, the activity of sodium percarbonate is generally from the evolved H2O2, which is what is leading to my confusion. Is it the residual sodium carbonate that reacts with the Baquacil, or is it strictly a concentration effect? I.e., is this a situation where 10 ppm H2O2 is fine for a shock, but an overload of 100s of ppm will destructively react with the Baquacil?