A little help, please!
I am in the process, thus far successfully, of clearing my green pool.
Here are the latest quick and dirty test results:
CyA under 40 This from a test strip. The water is still a little cloudy for the solution test, I think.
Temp 81 F
These results are about 20 minutes old. This morning the readings were about the same, but Cl was 5ppm
Vinyl liner, about 22,000 gallons, Hayward salt water generator. The cell is perhaps 3 years old.
Running the generator essentially 24/7, and adjusting pH and adding CyA the pea-green algae is gone.
Now the puzzler. I had kept the salt level per the generator at 3000 or 3100 ppm, depending on recent rain, etc. The day before yesterday the level showed at 2600, so I added some salt. Yesterday I started with a clarifier from Leslie's, which I've used successfully in the past. This morning the pool was much clearer. We were away til about 4PM. I checked the salt, and the generator said 2000 ppm, and it had shut down. I tried two salt test strips, one was inconclusive; the other said 400mg/liter, which is about 400 ppm. This sort of drop is absurd!
I really hesitate to add more salt! As I understand the chemistry of the process the only significant decrease in salt level would result from dilution from rain, or by backwashing and adding makeup fresh water.
What could have happened? I'll try cleaning the cell, although I'd expect a gradual drop off in output rather than .... whatever. I guess I'll take a sample to Leslie's.
Anyone have any good ideas??