Why is it insane that the controls determine the cell performance is unacceptable? Would you like it to keep running when it is not producing the expected levels?
Do you have the circuits like I discussed?
Are other circuits than the P running?
It can take the EasyTouch a 24 hour cycle to get changed schedules in synch. And if you manually turn P on or off it disrupts the schedule cycle for 24 hours.
Make sure all your pool PVC parts are Schedule 40 and not DWV.
https://www.troublefreepool.com/wiki/index.php?title=PVC_Repair#DWV_.28Drain.2C_Waste.2C_Vent.29
Cap it off with removable plugs at both ends so you can clean it out if it gets water and algae in it.
Or you can make it a fountain like this and turn it on when kids want to play in it.
I don't know what is "insane" about an electrolysis system starting up and monitoring the voltage and amperage as the chemical process stabilizes to see if it is within expected performance. If not, the control unit shuts it down and notifies you.
You have to go the other way. The default Pool circuit RPM must be the lowest you want.
Set the Pool circuit to 2200 RPM and schedule POOL to run 10 AM to 5 PM.
Then Setup a Feature Circuit called Pool High and set it to 3000 RPM.
Schedule Pool High Circuit for 10 AM to Noon.
You mean this Jandy valve?
It has nothing to do with your heater.
The valve selects between two return lines.
As set most water is going down pipe A and maybe 20% is going down pipe B.
I would clean away all the dried leaves from around the heater and pipes and pool equipment.
I would add 10 ppm of liquid chlorine to the water and test your FC level after it circulates for 30 minutes.
Report what Fc level you get.
You may have Ammonia - Further Reading
CH level does not effect Efflorescence - Further Reading
pH rises in a closed pool to reach equilibrium with the TA. That can be in the high 8's to low 9's.
https://www.troublefreepool.com/wiki/index.php?title=PH_TA_Relationship
I went from having high CH water in my pool to low CH when the water company improved my house water quality and lowered the CH in it. House water tastes and feels different and showers heads no longer get clogged.
Welcome to TFP.
What test kit did you use to measure CC of 5.2 and FC of 1.
What were the other measurements? pH, TA, CH, CYA?
What chemicals were added to the water last season, at closing or at opening?
PVC glue cannot cement PVC to rubber. You should use PVC fittings all the way to a PVC return jet.
Please post your pictures directly on the TFP server. You will get more views and probably responses.
https://www.troublefreepool.com/wiki/index.php?title=Picture_Posting_and_Resizing
That is Efflorescence - Further Reading from water getting into the spa shell and then coming out at the grout lines.
Check for small cracks on your spa spillover allowing water into the shell.
https://www.troublefreepool.com/wiki/index.php?title=Waterline_Scale_Removal
Your waterfall and deck are cracking from ground movement or winter freeze-thaw cycles. Plaster or concrete will develop cracks in a few years, so expect a constant maintenance cycle in those areas.
Show us wider pictures of the concrete deck. The crack may have been from the lack of an...
Please show us complete pictures of your equipment pad and all equipment. We need to understand your entire system to try and explain what is happening.
What black valve are you calling the heater valve?
What model heater do you have?
I don’t see a filter in your picture.
Welcome to TFP.
To turn off egg timers set them to 12 hours, not zero.
For everything to operate properly, your pool should be running on a schedule in POOL mode. The schedule should be enabled.
I don't know why the prior owner wanted to run the spa for 3 hours every morning unless they used...