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@Sierra Natural Science and their product, Mosquito Bits. The dunks are just an industrial sized version of the same thing, because I am treating my water 55gal at a time. It is not nematodes, it is a poison that stops larvae from reproducing in the soil. Stop the gnat cycle at any stage and you wipe them out.
I do not mix my soils when I build new containers. I use layers of various types of soil. I use Happy Frog as a starter soil, because that was what it was first intended to be used for. I am using a product that is no longer available and that I don't know another source for as a secret weapon ingredient in the middle of my containers, called Vulx. I suspect that similar results could be gained using vermiculite or moisture retention beads, but I like Vulx and have used it in this grow. This makes the middle of my containers a very nutrient rich and moisture holding layer. It is my belief that because this is where the bulk of the rootball forms, that this is very important. Then I use a mineralized supersoil as the bottom third of my container, that all by itself could provide everything the plant needed all through the grow. I also use thin layers of worm castings as I build up the containers, aged cow manure as the very bottom layer, and I have been seen putting a thin layer of blood meal just under the surface of the soil. Layering... way better than mixing. It allows the roots a choice as to whether to deal with a particular nutrient, and to be able to specialize in that area of the container to better deal with it. Mixing can not give you that, nor can it allow different areas of the container to have different functions based on the soil type found there.
