Depth of Perlite?

[cueball]

Thanks Cueball...but that doesn't look like 3 inches of peralite? Image makes it look closer to about a 1 inch?

Good call On this clutch of 8 eggs there where some stacked on top of others. This forced me to use less medium. I might have had to top off the water a couple more time for this clutch. With all the eggs flat I used ~3".