I have a customer with an indoor pool that has turned cloudy. The pool is about 20,000 gallons and uses Bromine. The pool turned because we were not able to service the pool for several weeks.
When I found the pool was cloudy, I added 4lbs MPS, and 2lb trichlor. I followed up several days later and added another 4lbs MPS and 6lb trichlor. The pool hadn't improved. One week later, I found that the pool was still cloudy with no noticeable improvement, but the FC/Br tested greater than 10 (FC) on a test strip (I know, test strips aren't very reliable, but for a ball park like greater than 10 it should be good enough). I also adjusted the pH accordingly each time.
I returned once again a week later (tonight) and found that it was still cloudy and the chemistry hadn't changed. This time I tested with FAS-DPD. I got FC=8.5 (if I'm not mistaken, this should be doubled for Bromine) and CC=2
When I added the trichlor shock, the pool released an overwhelming amount of chlorine gas (I assume, but maybe it was chloramines) almost instantly. The water coming from the return jets turned yellow.
So if I'm understanding how this is supposed to work, CYA is not a factor because we are dealing with Bromine. So if I'm getting FC=8.5 (Should be 17 or more for Bromine), I'm well above Shock levels, and it seems to be holding. I would expect to see it drop if it was fighting biological growth or getting rid of Chloramines/Bromamines.
So why isn't this pool clearing up? Any suggestions?