To avoid this:
|2" diameter stone base|
|Stable grid showing the cells. Water drains, but stone stays in place|
|The grids interlock easily.|
|gravel base seen on the right. Stable grid in the middle. Pea gravel fill on left.|
Finally we filled that with pea gravel The stable grid has open bottoms for drainage, but the plastic cells keep the gravel from migrating around the yard. The non-porous materials keep the smells down.
|Stones being put on top of stable grid|
|Done! The plastic is a product call Kennel Deck and it is just something extra for them to stand on|