So I have a tf100 but got away from checking it myself and hubby told pool boy son to keep putting three tri chlor tabs in chlorinate every time running low. Now pool chlorine is well over 20. Maybe higher. I Haven’t done anything but a basic oh test which now shows 6.8. Yikes. Not sure if other testing would even be useful. Btw my r-0870 powder is purple. Thought it used to be white. The chlorine only vial is dark purple when I put the scoop in and I can get to sixty drops with little change of color. The Taylor test shows orange. I stopped adding chlorine four days ago and no change. I thought the sun would help this. Hubby lowered pool a couple inches to add fresh water but obviously that wasn’t enough. Lol. Help would be appreciated.