Taylor k-2006 test kit. The instructions say to use 2 level scoops of the R-0870 powder, and offer no alternative instructions for 10ml vs 25ml samples. I have been using 2 scoops on a 10ml sample. Just read a post that says use 1 scoop for 10ml vs 2. Have I been testing wrong all this time? Are my test results inaccurate if I use too much powder?