Anyone used sand instead of stone?
I want to try and use a baking tray filled with sand instead of a stone. My thinking behind this, apart from the cost of a proper stone, is that sand may take less time to heat up because of all the air pockets, thereby saving electricity. I've got a bag of horticultural sand sitting around somewhere, I'm assuming it shouldn't have any chemical residue to make it unsafe.
Has anyone tried that before? I'm going to give it a go tonight, but any feedback is greatly appreciated.