I have seen holes drilled in live rock to accomodate zap straps in only one place. Big Al's in Burnaby. It is in their show tank. I don't think it is done all over the strusture, but I know for sure that to take some of the rock to the top they needed to zap some onto the glass braces. Looks really cool though
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Starting to put together a new tank for my new place.
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