Since this is a semi-lifetime hobby, one would /should try to find ways to conserve with the testings. I have an HTH 6-way drop test kit, and i was wondering... If im to fill the container 5 "squares" high and then add 5 drops, couldnt I fill to say, 3 drops high and add 3 drops and get the same result? Or better yet, if I needed to test for a higher chlorine sample, couldnt I fill it up to the 4th square and then add only 2 drops, get the reading and double the tested value? Example -- if it read "3" i would call it a "6" since i put only half the requried amount?