The two most important enhancers are something for the roots and something for the yield. If you are on a budget and are looking to simply keep your reservoir sterile and that no pathogens are hurting your precious root system, then go with
Dutch Master Zone. It is cheap, and very effective. However, if you are looking to take your roots to the next level, we suggest giving
Roots Excelurator from House and Garden a try. We have never ever ever seen a product this good in the hydro market place. It willl blow your roots way out and give them a shiny fuzzy healthy glow that stays with them throughout their lifespan. (Do not use these two products together.)