I recently completed a stenner pump project and am trying to fine tune it. Every day for the past couple weeks I've been checking my chlorine level with a FAS -DPD test ( using the 25ml sample and multiply drops by .2 to be as accurate as I can) Doesn't seem to be much rhyme or reason to it, but my daily fc losses are all over the board some times as little as 1.8 ppm per day but as much as 4.4 ppm per day. My question is: Is the variation in my results normal? Should I just aim to add 3 ppm per day? btw CYA has been constant @ 36-38 during entire testing period.