I recently purchased a home with an in ground gunite 10,000 gal chlorine pool. The pool was maintained using pucks prior to purchase and while I was able to keep it good and clean for several months, as soon as I went on vacation I came back to a green pool. I then neglected it for a week or so out of laziness and let it turn into a swamp... I found this excellent website and began reading up to become more knowledgeable on pool chemistry so that I could fix my pool and then maintain it properly moving forward (after getting a $1000 quote from a local pool company to clean it).
After a 2/3 drain and refill to lower my CYA from over 100 to ~40, within a little over a week of SLAMing (I did the best I could... I live further out and work downtown Houston so I am not able to test and adjust levels all day long), my pool was clear again although I did not have the FAS-DPD test at the time so I was unable to do the OCLT to determine if my SLAM was complete. So I continued to add bleach each day while I waited for the k2006 to arrive. Yesterday evening, the test kit arrived and I went out to test my water to find I had an FC of 0 and a CC of 0.5 - this was after adding 2 gallons of 10% liquid chlorine the previous night. So to get to my question - if all of my FC was used up, wouldn't my CC have been much higher than 0.5?
Also for those who are interested, I did get around to doing the OCLT - last night after adding 2 more gallons of 10% liquid chlorine, before bed I was getting an FC reading of 11. This morning, I got a reading of 4 which leads me to believe I still have something growing somewhere in the pool (will post pics later but pool is 100% clear with no visible algae growing) - is it possible the algae is in my cartridge filters? I've made sure to clean them several times throughout the SLAM process but haven't touched them the past 5 days.
After a 2/3 drain and refill to lower my CYA from over 100 to ~40, within a little over a week of SLAMing (I did the best I could... I live further out and work downtown Houston so I am not able to test and adjust levels all day long), my pool was clear again although I did not have the FAS-DPD test at the time so I was unable to do the OCLT to determine if my SLAM was complete. So I continued to add bleach each day while I waited for the k2006 to arrive. Yesterday evening, the test kit arrived and I went out to test my water to find I had an FC of 0 and a CC of 0.5 - this was after adding 2 gallons of 10% liquid chlorine the previous night. So to get to my question - if all of my FC was used up, wouldn't my CC have been much higher than 0.5?
Also for those who are interested, I did get around to doing the OCLT - last night after adding 2 more gallons of 10% liquid chlorine, before bed I was getting an FC reading of 11. This morning, I got a reading of 4 which leads me to believe I still have something growing somewhere in the pool (will post pics later but pool is 100% clear with no visible algae growing) - is it possible the algae is in my cartridge filters? I've made sure to clean them several times throughout the SLAM process but haven't touched them the past 5 days.