I did my weekly test today. I have a 20x41 inground pool with a vinyl liner and a autocover so the pool is protected from the sun unless we are swimming. I used the TF100 kit and noticed the drop size on solution 009 was a lot smaller than all the other drop sizes I saw from the other dropper bottles. I am thinking that is the reason for the T/A being so high. I redid the T/A with a guardex kit that the pool installer gave me and the reading was a lot lower. Anyone else have that issue?
T/A 650 with guardex kit it was 230
any other suggestions.