Will

I have a AO smith 110 gallon tank I purchased 2 years ago and purchased a popular powered anode rod for it on Amazon. I recently had to purchase another water tank due to more hot water demand. After paralleling the tanks I purchased this ICCP system because it cost less and I liked bolt connections over the slip on wire of the other product. I received it in 3 days after ordering. The instructions were clear and easy to understand. After installing it, I checked the power output with a voltage multimeter to the anode and it was 2.3 volts. I checked the other 2 year unit and the voltage was only .4 volts. Not fully understanding why the voltage was different, I switched the powered anodes on the tanks. The old power anode was still putting out .4 volts and the new powered anode was putting out a higher 3.1 volts on the older tank. I contacted water tank tec and asked why the difference. After a long email Matt explained that my power supply for the old product was slowly failing. He advised me to switch the rods back to the original tank and the results would be the same. After 1 hour water tank tec went from 3.0 to 2.2 volts and the other product was .4 volts. My test proved to me it is proof in the pudding that this product has up and down voltage that adjusts to the tank. I don't have the funds at this time to replace the older power anode but will in the future with this product.