I have a Hayward in line chlorinator which has given me a unique problem twice this year. It is set at 4 on the dial , a little less than half for flow rate, and delivers a nice consistent 2.0 to 2.5 chlorine rate. However, occasionally the water will dissolve the 3 inch tabs in the bottom and the tabs in the top of the chlorinator will jam in the cylinder. This leaves me with the proper flow of water going through the chlorinator but no tablets sitting in that water - which leads to my issue.
(Note during all of this issue CH has been rock steady at 240, no phosphates have been in water, CYA constant 40 and no metal contamination in water)
This problem of "jamming" occurred and I essentially went chlorine free for about three days in 90+ degree weather. The PH went to 6.8 with TA at 80 and no chlorine in a milky white pool. Seven pounds of Soda ash were dissolved in a bucket and broadcast into the pool. The chlorinator was "unjammed" and 4 pounds of Leslie's Power Powder schock added through the skimmers. The filter was regularly bumped and after 12 hours clarifier added to the pool. New results - PH 7.6 TA 130 FC 3.0 CC 2.0 Still milky white.
The next day all DE washed out of filter and new DE added. Flo-Rate improved through filter. 4 gallons of liquid shock added (to free up filter clogging) and filter run constantly. New results - PH7.4 TA 140 FC 5.0 CC 2.0 Still milky white.
After 24 hours from liquid shocking Pool First Aid added per directions 28 ounces. Filter run over night - slightly better on water clarity at best. PH 7.4 TA 140 FC 3.0 CC 2.0 Four more gallons of liquid chlorine added - flow rate on filter deteriorating, bumping every hour. Clarity has improved from 12 inches to maybe 24 inches.
Obviously this issue started with a loss of sanitation, but why the stubborn lingering problem? In 21 years of owning this pool I have never been cloudy for more than a day or day and a half till now. Your thoughts and suggestions please.