I have seen very young 'awa plants being grown in flowing, nutrition-added water which did not survive longer that a few months due to roots staying too wet.
However that's not the full story on "Hydroponics" which can, usually, includes- "Growing Mediums-The purpose of a growing medium is to aerate and support the root system of the plant and to channel the water and nutrients. Different growing mediums work well in different types of hydroponic systems. A fast draining medium, such as Hydrocorn or expanded shale works well in an ebb and flow type system".
That said-- a growing medium such as volcanic cinder or sterile sphagnum moss can work fine however I have only done this for the 1st few months of a plants life and have no experience beyond that because I'd transplant the "hydroponic" to a soil, outdoor environment. Regardless, I doubt anything can increase the percentage of kavalactones except time, age.