advanced products are all fine to mix if in flower stage also make sure that you add you big bud 1st before adding the a and b.thebest advice on advanced grow products is on there web site but never add the ammount on the bottle stick to around 1.5/1.7 ec, i also do the 1.5 rather than any higher at week 1 of flowering.I give you a good advanced grow sced week one has soon has you get your clones or has soon has your seedlings reach the bottom of the pot start on 1.1 ec week,useing nothing other than a/b and a drop of superthrive for every litre of water been used a tear drop of superthrive.Week two the plants ie young clones teenages should have reached the bottom of the pot just water around the plant and dont over do it,set them of at 1.2 at this stage wk 2 start.wk up to 1.3 then week for of veg 1.4 by the end of week 4 the plants should be getting on for 1/1/2 ft tall with nice tight nodes,if you are useing hps or hid.But i do think hps just throw more bud but that is just me alot will dissagee.