I sugest rather than using a grounding probe which as I understand them are stainless steel rods hung in your aquarium with a #14 AWG or #16 AWG wire to the nearest U-ground receptacle, that you make a current collector. QED
Use a stainless steel nipple in line with your return line to the tank. Attach a ground clamp securely on the nipple and run a #6 copper conductor back to the nearest cold water pipe if you have metal plumbing, or back to the ground bus in your electrical panel if you have plastic plumbing. If you have a mixture of both types of plumbing on the way to your fish room then bond at the panel instead.
This will provide a low impedance pathg back to the distribution tarnsformer and ensure your GFCI or circuit breaker will operate as it is suposed to.
Use a stainless steel nipple in line with your return line to the tank. Attach a ground clamp securely on the nipple and run a #6 copper conductor back to the nearest cold water pipe if you have metal plumbing, or back to the ground bus in your electrical panel if you have plastic plumbing. If you have a mixture of both types of plumbing on the way to your fish room then bond at the panel instead.
This will provide a low impedance pathg back to the distribution tarnsformer and ensure your GFCI or circuit breaker will operate as it is suposed to.
