I'm ditching the @ease as soon as I run out of the year supply I got.
I have a 550 gallon Artesian spa with the in-line system.
- With the setting at 3, the chlorine levels are always over 1.5ppm; sometimes even higher.
- Drop it to 2, they will stay around 1ppm.
- Even with the cartridge set at 2, it will only maintain levels for about 2 weeks. Then at the 2 week mark I have to take it out and put it up to 3, and it will just (and I mean just) make it to the 3 week mark before it's empty. With heavy tub usage its more like 2.5 weeks.
There's no way I'm going to spend $14 for 2.5 weeks of chlorine, when I can use the bleach method for pennies.
I also had a terribly difficult time maintaining pH with the system until I added about 50ppm borates. It'd be nice if the manufacturer even mentioned it anywhere. Even when I contacted them they had no clue. For me, I have to keep the TA very low around 50ppm, then add 50ppm boric acid, and bump the CA up to around 175. With that, I'm able to maintain the pH in the appropriate zone.