I have the DPD complete kit from Leslie's. My re-agents are Taylor brand. I brought the FC up to 15 and had it there for 3 days and today It is now down to 4. The water remains crystal clear. I will be going out of town for 6 days so i plan on bringing the FC back up to 15 or so the morning I leave to hold it over while I'm gone. I will be doing a 50% drain when I get back to town. My tap water tested with just a hint of FC (less than 1) PH and TA are both in normal range. I also plan on breaking the filter down and cleaning the cartridges while I drain it. Is there any good indications if they need to be replaced when I have them out or will I have to put it all back together and see where the pressure ends up after cleaning? Right now it runs at about 18-20 psi.

Thanks for the replies

Tim