blocks

Any tips, info, knowledge, ideas, will be 5 gallon buckets with 6 in grodan blocks with starter plugs AND GOOOOOOOOO.... .

So i currently have 9 critical kush just germinated in root riot cubes under a 125w cfl, i have blocks of coco coir ready to be expanded so i can transplant when roots start showing and put under 1000w so my question is.... The water i am using to expand the blocks should i mix nutes in with...