As long as nothing in your tank can make it's way back to ground stray voltage is not usually an issue as there is no current involed then just like when a bird sits on one overhead wire it is fine. All your equipment might have the ground post on them but still may not trip if there is not enough potential to ground. With stray electrical a good place to start is with heaters and lighting. Even if your lights are to close to the water the voltage can jump. Powerhead would be unlikely because the windings in the motor would burn out if water got in.
Does anyone know if flowers and tigers have more sensory receptors or whatever they are called than other rays?
Does anyone know if flowers and tigers have more sensory receptors or whatever they are called than other rays?