well sure there's no "electricity" to speak of running through the blocks, but the battery effect is real, and i don't know if grounding waterblocks reduces it or not. i don't actually think it does, because as someone else pointed out, waterblocks are grounded via the water which flows through the heatercore which is touching the case. also, water additives like antifreeze are supposed to prevent the battery effect. water wetter = crap b/c of the film it leaves on everything. it's gross, can kill flow in a block like the white water or cascade, and makes your tubing rather opaque and gross
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