Needed to order replacement CYA viewing tube for my TF-Pro test kit....

[Cetanorak]

...and I seem to have ordered a MUCH large viewing tube, which I now know is from the TF-100 kit. What is the point of this much larger tube, seems like it would use way more re-agent. Filling the small tube up to the 50 mark and transferring to the large tube barely fills to the 100 mark.

Can I even use this large TF-100 tube with my TF-Pro kit, the CYA mixing bottle that you fill to 7.5mL line with pool water and then to the 15mL line with R-0013 or does this large TF-100 tube pair with a larger mixing bottle in the TF-100 kit?

I'm assuming that I'm going to have to order and pay for shipping another CYA tube.

 

[mknauss]

You can use it. It just takes more water sample and CYA reagent. Use 15 ml of each.
The smaller tube was initiated for the TFPro. The CYA reagent had to be put in smaller bottles and thus less of it included in the kit. The smaller tube allowed for half the reagent use per test.