The purpose for using a ground rod is to diminish potential difference. For example if a heater leaks or fails, there will be a potential difference bewteen the piece of equipment and ground. When using the grounding rods or plates supplied by the supply ( the ground rods at the power supply to the house or to the local utility transformer) it is often located far enough away from the tank. This is the leakage that we feel, If we use a grounding probe at the tank we diminsh the effect of the leakage, the effect diminishes or increases with distance.
This is as simple as I can state it. If you don't want to use one don't This is just my opinion, with years of designing electrical distribution, from everything from watertreatment plants to multifamily dwelling.
You might get away with it once or maybe a thousand times, but I am of the belief that price might be to high to take that chance. The rest I leave up to you.
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180 gallon SPS Dominated reef, Reeflo Orca 200 skimmer,Proline Zeovit reactor,3 250 watt halides in lumenarc mini reflectors and 2 vortecs for flow
Numerous corals,2 purple tangs,choclate mimic tang,Foxface,Solar wrasse,male and female lubbocks wrasse,hoevens wrasse,Carpenter's Flasher Wrasse,Blue Sided Fairy Wrasse,yellow wrasse,3 Yellowstripe Anthias,True percand S.Gigantea anemone
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