Thanks watermom,

I just completed my first test with the PS234 and I did use the FAS DPD test although I thought it was just testing cc and fc. I had to dillute with 5parts distilled water to 1 part pool water because my pool sample was almost red and I lost count of drops I put in the sample with no color change so here are my readings. Let me know if this seems right.

CL. 10 OTO test wit 5ppm dis. water and 1ppm pool water
FC. 7 used same dillution as above
CC. ? when dillution method was used only added 1 drop to clear water
PH. 8.2
CYA 70 Really like thie bigger tube can see better.

now these readings are 2 days after keeping my pool at shock level around 15-20 for about 3 days to clear a alge bloom
I think I have done these tests right but not sure.
Thanks agin for the help

How do I register my kit to get into the other part on this site?