Some people treat the OTO test as almost a yes/no indicator (there's something in there, just don't know how much).
Once you learn how the pool behaves, the OTO can become a quick sanity check that things haven't gone terribly wrong, and then once or twice a week or whatever you use the FAS-DPD to nail it down more precisely.
--paur
Once you learn how the pool behaves, the OTO can become a quick sanity check that things haven't gone terribly wrong, and then once or twice a week or whatever you use the FAS-DPD to nail it down more precisely.
I don't think I've seen that statement before... could explain part of why the OTO and FAS-DPD don't line up as well as they ought to.waterbear said:most people do not realize that it [the OTO test] needs to sit for about 3-5 minues to fully develop.
--paur