Hydro in COCO Slabs Nutrient Selection

What are your opinions of the best nutrients and feeding regimens for growing hydro in coco slabs? I was always a fan of Botanicare line but what does everyone else think?

I use biobiz for coco, pretty good stuff without any chemicals.
They also do a complete line up so get as much or little as you want..
No experience of other brands, but good luck.