I have had this installed in my MasterSpa 557 LSI (continuous circulation) since last September (7 months). I have found it to be very reliable and I love not having to add all the chemicals. I recently drained and refilled and found I don't need quite the salt concentration as suggested in the manual. The only issue I have with my water is the pH, which is very high (>8.2). To adjust I use muriatic acid. That is all I have ever added and that is only initially, and very infrequently after that. A setting of 3 seems to work for me since I am the only one using the tub (3-4 times per week). I love the feel of the salt water - skin actually feels softer. I am not sure how long the cell will last at this point but I have no issues with the unit thus far. I have not examined any of pump internals, valves, or piping for corrosion and scaling. My ozone generator appears to be working as before. I had to tie the salt cell into the discharge of the ozone generator which does not appear to have any adverse impact.
Before conversion I was using bromine which had quite an unpleasant odor. The test kit for measuring salt concentration is very poor but analysis can be performed by a local spa dealer.
Ordered ChlorMaker IL (In LIne)
, Wardsville , Missouri, USA