I have consistently tested 30 - 35 all season.
When i went to test today i filled to the bottom of the label per the instructions ..... then used the last of my reagent and got 80% or so of the way to the top of the label.
My reading was 50 or so the way it was mixed.
So my question is does that make sense that with too little reagent i would get a higher CYA reading?
Also ... approximately how many tests should i be able to do with the reagent supplied in the tf 100 xl test kit (i believe the xl is irrelevant and only give extra material for CL test)? ...... my kit came with a big huge bottle of CYA reagent but it was only 20% full.