One note: I see from your chlorine readings (3.6ppm FC and 0.4ppm CC) that you are probably using the 25ml sample size for your chlorine tests (multiply drop count by 0.2ppm). You can save your testing reagents by using the 10ml sample (multiply drop count by 0.5ppm). 0.5ppm is plenty acccurate enough to run a pool. Another way to conserve your test reagents is to use 1 dipper of DPD poweder instead of two - if the sample turns pink, you have plenty of powder.