First time grower. I kind of stumbled upon a very nice way to measure and deliver nutes to DWC buckets. I use Dutch Master A & B nutes. At Walmart I found 'Flavor Injectors' that are graduated by ml. (http://i.walmartimages.com/i/p/00/07/67/53/33/0007675333147_500X500.jpg) Now I just pull the nutes into the flavor injector, then push out the nutes from the flavor injector into the DWC buckets.