Plain and simple the ace salt water sanitizing sytem is the worst chlorine generator in the entire pool and spa industry. With a known failure rate of 80% it amazes me that dealers are even willing to sell it. But i guess when it cost springdance $350 and the sell it for 1200 plus the install and if you fight them they bring it down to 900. Sooo they still make a nearly 600 dollar profit for every POS they sell. And a word to the wise. If you are using the oxidizer that comes in the orange bottle that springdance sells. READ THE LABEL! !! that stuff has calcium minerals in it. So you pay 80 for a bag to remove the calcium and then your paying to pour it right back in. The amount of time and money most people spend dealing with the ACE system Could have bought and maintained 3 hot tubs. My sincere advise is buy the tub and as soon as the sales people bring up the ACE system walk out the door. They push ACE like its the new sliced bread when in reality its the new time share.