Your thoughts onDiy Live rock

Well this diy live rock would save me bundles, live rock at my lfs is 9$ a pound and i could make 5 lbs for like a buck…
The recipe calls for 1 part portland cement #2, 3 parts oyster shells then you let the rock cure for 6 weeks in a tub of fresh water doing daily water changes on the tub. what do you guys think?

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Your thoughts onDiy Live rock

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