I've recently had a pool installed in Melbourne Australia (specs in sig) and everything was great for a couple of months. It has an ORP-based SWG with liquid chlorine boost (if required) and auto pH adjustments. I was just using test strips to confirm the ORP estimations and pH and everything seemed to be fine. Then I left it for a bit over a week and next thing I knew it was a nice green colour.
Without an accurate test kit (just the strips) it was difficult to accurately SLAM so I just kept the FC extremely high for a few days with the pump running on high speed 24 hours a day until it cleared up. That was about 3 weeks ago.
I've now got a k-2006 and have come up with the following results:
A couple of things are confusing here and I'm wondering if someone could provide some pointers.
1. The CC is high but It looks like FC has been >11 for about 3 weeks now. Shouldn't that have brought down the CC?
2. I know it's not an accurate measure, but ORP has been sitting at 690mv. I though that with FC at 13.6 the ORP would have gone up higher than that. Does that sound right or is the CC pulling the ORP value down?
Any advice would be appreciated.