Brew12, Early on, you said a grounding probe wouldn't be much use to freshwater tanks, as freshwater act very differently than saltwater. What would you suggest to use in grounding stray voltage in freshwater tanks? I think it was mentioned that voltage goes "around the fish" in saltwater and "through the fish" in freshwater. So would it be correct to assume, if there's a gadget leaking voltage in freshwater, first sign will be that all fish in the tank will be dead? Second question.... I know you said you prefer to have grounding probe plug directly to a wall outlet, but via a power strip will be also be okay. This is to avoid plugging into a non-grounded power strip, giving a false sense of protection. Will using a receptacle tester (https://www.homedepot.com/p/Power-Gear-3-Wire-Receptacle-Tester-50542/206212329), help verify that the power strip in question is working/grounded correctly? Thanks!