I know that all the different aeration ammendments have their own charachteristics and that a diverse mix should be helpful to an organic soil. I'm interested in hearing what people use, what their ideal mix ratios are and why? Right now I've got 7 parts perlite in my mix. Since I want to try smartpots sips (constant moisture) I think good aeration will be more important than water retention. I'm thinking of adding 2 parts diatomaceous earth pellets (for silica and insect control, the auto oil cleanup stuff) and 1 part small lava rock (thinking diversity = better cec?). Won't be in time for this round but I'd like to add in rice hulls to my next soil mix.