So I got my TF100 kit and it had my pH at 8.2, which was pretty consistent with the strips. Though pH2 was the highest so it may even be higher. I've read SWG pool pH runs high and had added muriatic acid a few weeks ago when I just had the strips and those read high. Today, with the 8.2 pH reading on the TF100, I added about two cups (just under the 18oz required) of pH down to get the amount down. Yeah, it wasn't Muriatic Acid and I get all the downsides but was sick for days from smelling the fumes of it. Four hours later, it was still at 8.2 (and that's with the four swim jets mixing it all up for four hours) so I went to add two more cups of pH Down and accidentally added pH up! So I added another two cups of pH down in hopes that this would counterbalance the pH up but I'm terrified to even go in the pool now. I'm going to wait until tomorrow to test it. I'm guessing the pH Down will cancel out the pH Up and I'll still be too high of a pH. Any ideas why this pH runs so high??