Split off of Pool Pilot Dig220 Salt Level reading way off. JasonLion
On my Pool Pilot unit I have to manually input the salt level, could this be the salt level issue? If you are unsure of how to input manually call their help desk, they are very helpful. Of course your unit could be different and it could simply be reading wrongly and need repairing.
I also have an adjustment for the pH and setting this correctly seems to adjust the salt level as well but not by much, not all units have this feature.
The algae issue may (and I am definetly not sure of this) be caused by under production of chlorine due to the high salt level the unit thinks it has; when in fact, as you point out, it does not have this high a level of salt. Check with the help desk as I could be completely wrong on this.
Once you have checked the level of salt as everyone points out with a proper test kit, you may indeed have 6500 ppm. The help desk tech told me the ideal level for my Pool Pilot model is 3200 - 3300 ppm, even though the manual states 3,000 ppm, yours off course could be different. Some units can of course operate with levels up to 35,000 but when mine was at 6,500 by accident and my inputed reading was 3,200 it either under or over produced but I cannot remember which. as I quickly brought it back to 3200 by draining down half the pool water and refilling with fresh water.
Some units may only be able to operate up to 5,000, I am guessing here, but if this is the case for your unit that may be the issue.
In any event after getting a good reading I would call the help desk they are very helpful.
As regards algae you really need proper readings from a good test kit such Taylor's, it could be that your CyA is too low (under 25 -30) or too high (over 100). As you reduced the size of your cell I am not sure based on your daily chlorine loss what percentage you need to set it at, it would have to be higher than your old SC-48, but if that number has to be over 70% then you will ideally need to run your pump longer or get a bigger cell. If you are still running it at the old cells percentage it is most probably too low and could be the cause of your algae issues.