I've been giving mine 2 grams Megacrop per gallon and 1 gram Sweet Candy per gallon since sprout. I'm in Autopots so each pot got 1.5L before putting in germed seed, 5 days after sprout 500ml, 10 days old got 750ml-1L, 15 days old 1L. I then turned on the reservoir at day 18 but normally I turn on at day 20 just do to low humidity it was turned on few days earlier. I'll be going up to 3 grams Megacrop and 1 gram Sweet Candy next res fill. But I'll be using Sweet Candy from beginning to end just like I did on my last grow.