Powered anode rods in water heaters

[James Mc Ree]

Have you replaced your water heater anode rod with a powered anode rod, such as one from Corro-Protec?

The Corro-Protec marketing claims are they are a once-and-done replacement that extends your water heater's lifespan to 20+ years. No more rod replacements needed, unless it breaks. The materials also claim the powered rods help reduce sediment. What have your experiences been? I am considering them for my SFR rentals for which I've done no water heater maintenance. I'd like to start with flushing every few years and replacing the anode rod every 5 years or just once with one of these powered rods.

I am skeptical of the very positive product reviews since the review really needs to be submitted 10+ years after the installation to be meaningful and they never are.