This what I bought from him.
1 pound each of
Mono Potassium Phosphate(KH2PO4) - supplies phosphate and potasssium (PO4 and K)
Potassium Nitrate(KNO3) - supplies nitrate (NO3)
Potassium Sulfate(K2SO4) - main source of phosphate (PO4)
Magnesium Sulfate(MgSO4) - magnesium (MG)
Plantex CSM+B (traces)
I don't dose calcium since my water source has plenty but the Mg is low.
I mix KNO3, KH2PO4, K2SO4 in 400 ml of water and dose 3 ml a day. This gives me about 0.75:0.25:1.00 ratio of NO3:PO4:K. There are also two other mixes, an NO3 free mix and a PO4 free mix depending on the tanks needs. If the NO3 is too high I can switch to the NO3 free mix. If the PO4 is not being used I can switch to the PO4 mix. What I like about this is I am only supply enough nutrients to get the plants through a day or so.
Made mix of CSM+B in 400 ml and dose 3 ml every day. This supplies my trace elements.
Takes about 2 seconds to dose my tank.
Anyway it has worked well so far. I'm doing something called PPS based on a post by Edward at APC
It's very simple so far and I find it much nicer then commercial bottled products. Still using my bottled products on my 10 but when that is gone I will stick to the dry chemicals and mix my own. Cheaper and more flexible.