Pests shouldn't be the concern, nutrient build up should be the primary issue. Yes, I know a lot of stores resell the rock from shut downs, that's why I mentioned to make sure it's fresh. I wait for orders or order it in.
While I agree it is possible to get perfectly good rock from someone shutting down, assuming the rock is reasonably young and the owner managed nutrients really well, there is no real way to tell unless you know the person and their tank. But usually, the rock is already in a tub and who knows what's in it.
Again, it still might be fine. But the risk is getting higher.
How many people get out of the hobby before they really even get started, due to unmanageable algae issues? We see it here all the time. So yes, my way costs more up front, but it lessens the risk and increases the chances of enjoying the hobby for many years, instead of trying to figure out how to get the lawnmower in the tank!!
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Brad
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