i use chili focus from seedling on. when i repot to the last pot i also blend in some bat guano (guano kalong) and epsom. i also use the different organic additives from growth technology, nitrozyme (kelp concentrate), green age - plant stimulator (seaweed , not concentrated), green age - soil enhancer (humic acid).
chili focus is great, no problem, not difficult. the dosage is 5ml/L seedling on, then at first signs of bloom its 10ml/L, no risk of burning or overfeeding... if the plant seems its needing more fertilizer then its ok to feed up to 3 times a week, just remembering not to up the dosage per feeding.