I have never used the mediumless method so I will not comment on this.

I first explored horticulture techniques over 20 years ago.

here is my take.

Striaght vermiculite is good, but it compacts over time
(especially if more water is added). this will restrict air pockets through it.

Perlite doesn't absorb water as much, and thus will create more air pockets throughout the medium while still holding a good ballance of water/air mixture.

I cant give you a ratio, as I go by the texture and feel of my mixure(I have never measured it).

You will probably have good success with striaght vermiculite, but I like to know my eggs can get air from beneith as well from above.

just my 2 cents

TomChambers

[ Show Entire Thread ]