everyone has differnat methods of feeding and use differant types of food and additives its really down to you . you dont want to be feeding the seedlings until the 2nd week and then start of with minimum amount of feed . the fox farm biocuzz or canna are all good range of nutrients once you have chosen the nutes that suit you come back and ask again though you can get nutrient charts they arent that good unless u are using reverse osmosis water.be safe the postaman