Sounds like the guy is mixing up his setup. You run a bubbler 24/7

1ML Superthrive per gallon is a great seedling mix for the first week or two then I just use this schedule: http://www.generalhydroponics.com/ge...irculating.pdf

It sounds like your store is just trying to sell you what is most expensive. For massive root growth us this: BioBizz Root Juice

Too keep everything free of rot or bad bacteria: Hygrozyme Portal by Sipco