The "only water" soil mix?

has anyone done the "only water" or "super soil" mix? if so could you please help me out?

try to build your own and use subcool as a starting point. i have done it in the past when i had 1 light and it works well. just a lot of mixing of different powders for veg and flower soils. i transplant before flowering so bloom soil is used 2 weeks before start of flowering. the plants grow slower. harvest size is not quite as large. depending on powders used flavor will be affected due to not being able to flush like using liquid nutes. experiment. i like to mix the soil at least 2 weeks before using so the powders can start to break down and mix better with the soil.

i always use this soil outdoors as liquid nutes are tested indoors and the schedules are for indoors. this year i will try the new AN line of outdoor time release pellets.