Just thinking

[Leverage Lad]

Has anybody seen these? They are used when you want to put a grate in a concrete slab. This is the tallest and would suport the wire about 3 1/2" above the ground. My question is could you use this to support eggcrate witch in turn would support your rocks. leaving plenty of room underneath for water flow? There is the problem of vacuming I havent quite figured out. Ant thoughts..?

[APFish]

I am not seeing the picture, but what you describe is something we call a chair. If so I have seen them as short as 1 1/2" and as tall as 9". I would need a picture but if it is what I think it is, there are some that you could put a rock in. I will look for pics.

Rob