What do you use in your incubation tubs?

[xdeus]

Where do you generally find your substrate supplies? I did a general search in my area and didn't find much, so it's going to have to come from someplace online.

I picked up a huge bag of vermiculite from Home Depot that has lasted for years and is only about 1/3 empty. I also use the light bar/no substrate method so the eggs never come in contact with the vermiculite. It's just there to keep the water from sloshing around when I move the tub.