Jim

I am a retired engineer from GM in the electronics division. I purchased 2 systems from Amazon that had great reviews. 1.2Vdc and .05Vdc were the readings to the anode current after 2 months. 3 months later the power unit went out on one unit, the other was .2Vdc. When I removed the anode, the black coating was flaking off. No chemical eching was noticed on the rod which told me this is a very cheap product.

I purchased the water tank tec system 3 months ago for both of my tanks. Each tank is an A.O. Smith short 50 gallon unit. Each week I tested both tanks. #1 2.43Vdc and #2 2.47Vdc consistant voltage on each tank.

This product performs as described.