Unfortunately I think you are out of luck we once had that older size in the parts room
I looked and couldn’t find anything to match
I believe they stopped making that size many years ago
CMP makes alot of replacement parts but I couldn’t find anything to match that size in their catalog...
Parts are very hard to find for that model
We just sold our last bulbs last season
I recommend replacing the entire unit as @JoyfulNoise has already said
DelOzone is the brand we now sell
Call around local pool store do have testers to check cell life.After that long most cells need to be replaced.
Most of our customers get 4-5 years out of a cell.
The scale is calcium carbonate from plaster curing it was never removed after initial start up it now will be very difficult to remove.
An acid wash may be the only way to solve the issue although not recommended
The start up process was not done correctly or at all in my opinion
Seems a little weird that CYA got that high in one month with fresh water??Also what was the CH?Your heading for trouble already if you keep using tabs and shock
What shock did they use?Cal Hypo or Di Chlor?
Stick to liquid or get a SWG
All going well on sensors/salt readings have salt output at 4 has maintained a 3-4 ppm on Chlorine and pH of 7.4-7.5 and TA of 85-90 CH 45
So far after getting original high chlorine level down the sensors have been responding accordingly.