DIY live rock??

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I've been Making some rock for the past couple of days and I'm pretty impressed with it.

After going to the Local SW store, I literally puked in my mouth when I saw the price of LR....

I've been using 4parts of crushed oyster shell and 1 part portland cement. Now for the holes in the rock? Rock salt..Nope...Softener salt? Nope
This may sound very strange but I used Cheezies...Yup Crunchie Cheezies, Not only do the make the holes somewhat unique, they pull out of the cement very easily after 24hrs of the rock setting. They pretty much become like a sponge.
I'll post some pics once I'm all finished up.