A: Great question. The main difference is power and lifespan: The RJ models are going to give you significantly more power and longer lifespan for the money.

Some other basic things that set them apart once they are:

The SJ models are very simple, easy-to-use systems. They have status lights that verify the unit is working, tell you at what power level it is set, and whether you need to clean the cell or add salt to the pool. This model also allows you to remove the cell plates and clean them with its included cleaning tool (no acid is required).

The RJ models are higher end systems that measure independently the pool's salt level, the water temperature, and the electronic performance levels of the cell so you can see exactly how things are working. The power levels on the RJ models can be turned up and down in smaller increments. RJ models also synchronize more easily with variable-speed pumps if you plan to upgrade. Answer provided by:  Administrator (4/8/2019)

A: Greetings Bill, we are absolutely glad to set something up for you and see what is possible. I found your original purchase under your email and created a reference number for you in our system. Please call 888-206-9938 ext.1 and give us the reference number "Q28279" and we'll be glad to help.

About the voltage, it works the same on either 220V or 110V, you just want to match what your pool pump is set to use so they can be wired to the same circuit. Most pool pumps use 220V. Answer provided by:  Administrator (3/5/2020)