Well, a few weeks ago, noticed the salt reading was down around 2500, so I added a couple bags. 2 days later, it read 2800, so I added a couple more bags, still read 2900. So, I left it for the moment. Where I failed was to not test the salt with a strip before adding. Well, I had to go on a trip and did (forgetting to test the salt level, trusting the reading. Nor did I test the chlorine (I've been getting very complacent an a very well automated setup. Got back from the trip to a green pool.
Tested the salt, it was like 5900 - 6200, don't remember exactly. Salt system was reading 1800 at this time and had kicked off, hence the lack of chlorine and the growth of algae. This was last week. So, I've been fighting the algae with chlorine and it's fairly cleared now, but I still need to keep the levels up for a bit longer. Today, the system is reading 900 ppm of salt, tested it today at 4800; haven't had time to drain water to fix the salt level yet.
Currently the pool is cloudy but clearing. It's also eating chlorine like I've never seen. I've been using simple bleach but due to how quick it's eating it (coupled with 100+ temps) but I've decided to put some tablets in a floater to help keep a steady stream going in as well.
Now for the salt problem. I cleaned the cell about 8 weeks ago right at the start of summer. I was fairly positive I cleaned it thoroughly but, is it possible it's got more deposits on it than I thought, seeing as it's not reading the salt properly? Is there a problem with the cell that I'm not catching? Should I pull the cell and attempt to clean it again or any other suggestions?
I'm running the Hayward T15 cell into a Pro Logic automated system, which kicks off if the salt system if it's not perfect.