I was getting ferts off valray to but did a bit of research and i now find that dry ferts is allot easier that way you have allot more control of what is going on in the water column.
Have found and a few others that stocker hydroponics in Cambridge do a great aquatic trace mix.
I add 1.5tsp KNO3, .5 tsp KH2PO4, .5 Aquatic trace mix every mon,wed,fri 50% water change every sun with 2 Tbsp MgSO4.
This is for 650ltrs with a 8 hr photo period of 4 t5s 2 t8s. you will need to add more with MH running.
Its get it very close to what jen has mentioned. The planted tank has a good index for dry dosing.