Mostly I use RO water with Cal Mag added but have been playing around with some supplements... I use Bud candy & Sucanat during flower per sub's recipe... and then I have been also throwing in some liquid kelp, Nirvana, Organic B-1 and sea green throughout periodically.
I do beneficial teas during veg and start of flower that consist voodoo juice, tarantula, piranha, earthworm casings, sea kelp, Organic B-1, Sea Green, Nirvana... and I am starting to try out some Guano teas. The Sea Green product is an enzyme type product that is suppose to help with nutrient uptake and allow you to push the plants without getting burned. The tea recipe that I am trying out is the appropriate guano depending how far along the plant is, earthworm casings, molasses, liquid kelp, Organic B-1, Nirvana, Sea Green.
Hope that helps, let em know if you have any other questions.