I've seen these from time to time, I'm wondering if they are good, bad, or just a waste?
https://www.amazon.com/Sun-Shock-Remington-Replacement-Irritations/dp/B07N1XHM31
Remington Solar Copper Anode, 2 x Replacement, Sun Shock Solar Pool Ionizer, Save 80% on Chlorine Costs, Helps Reduce...