I do service work for a convenience store that has scale in the water. The scale is so bad it causes this Follett ice machine, Model HCC1000A to shut off on high amp safety every two to three months. I clean the machine with ice machine cleaner and the amps drop until it scales back up. The store run a pre filter, four submicron filter, and a scale stick and still has a scale problem. We change the pre filter monthly and the others every 6 months. Any you guys got any recommendation on what I can do keep this machine from scaling up.