This is 20 days in DWC with return. Exotic Gelato fem RDWC - #11 by IKnowURider. To me, the speed of growth and yield advantages out weigh the added complexity. No extra cost - I built mine from Lowes and HomeDepot. Get a good PH and EC reader (Hanna is my pref) and follow the many grow bibles and you will be in bliss.