I just purchased a home with a Zodiac LW2 SWG installed.
The old owner just opened the pool before i got it, but did not add any chemicals to it.
I am not sure how old the SWG plates are, but they are black as black can be with no calcium build up.
I added schock, then a day later, salt to the pool (as adivsied by my pool place w a sample), got it all dissolved, and turned on the SWG, and left it for a couple days.
Came back to it and the "Add Salt" light is on. The current level for output is 2 out of 5 (which i was told from the previous owner is the acceptable level and he has never changed it from that level).
I took another sample to my pool place:
FC - .1ppm (2.0-4.0 recommended)
TC - .2ppm (2.0-4.0 recommended)
CC - .1ppm (0-.02 recommended)
pH - 7.9 (7.2-7.8) (we just had a whole bunch of rain in the past 8 hours and was told not to worry about the pH levels)
Hardness - 230ppm (175-350ppm)
Alkalinity - 110ppm (80-150ppm)
Cyanuric Acid - 10ppm (30-100ppm)
Salt - 4000ppm (3800-4000ppm)
and they advised me that my CYA level was low, and to add stabilizer in, also to up the up the output on the SWG.
I have not added the stabilizer yet, but tried going to the SWG machine to up the output, but the level will not change no matter how much i press the button. The ON/OFF button and SuperChlorinate buttons work, but the levels on the Output are not changing.
I called Zodiac and they advised me that I should turn off the SWG, add some chlorine pucks to the pool, raise the level to 3ppm, then turn back on the SWG, press the hidden reset button for 5-10sec then superchlorinate.
Then retest after a day or two and see what the levels read.
Has anyone ever encounted this before? It seems that the only problem I am having is the FC and TC levels are too low, as the CYA levels will be fixed with the stabilizer i got.
I am not sure if by adding the chlorine pucks will "kick start" the SWG again.
I guess my actual question is, if I am having trouble with the SWG pumping out enough Chlorine levels, would adding a chlorine hopper to the pool to keep the FC level at or around 3ppm help? Will this harm the SWG?