i have been looking at this idea too for quite some time, not tried it yet i just am not brave enough lol
a couple of products i noticed that claim are suitable for hydro without blocking up pumps etc and being in a state which allow them to be fully dissolved in the solution
(iguana) from Advanced Nutrients
is a complete "hydro-organic" nutrient. That means it's 100% organic but also 100% usable in hydroponics gardens. It feeds well and is completely soluble in Aeroponics, NFT, rockwool, soil, sphagnum, ebb and flow and all other garden types
(BioSevia) GHE (bioponic)
organic nutrients are formulated in order to slowly decompose in soil so, when in water, some of their elements will rot and release some quite unpleasant smells. Finally, they would clog the filters and injectors.
To be bioponic, a nutrient must be liquid or perfectly soluble. It must be rapidly degradable and readily available to the plant. BioSevia fits to all these conditions
i think it might be a good idea to also add enzymes and bio products
like Hygrozyme and Vita Link Bio-Pac
Vita Link Bio-Pac
contains a huge range of beneficial organisms including (amongst other things) humates, cold water pressed kelp, amino acids, carbohydrates, essential B vitamins, vitamin K as well as nitrogen fixing, phosphorous solubilising and growth promoting bacteria. In practical terms these help to enhance root biomass (quite dramatically!), increase efficiency of nutrient uptake, increase yield and increase stress resistance. Once colonised by Bio-Pac, plant rootzones will be healthier and more efficient
Hygrozyme
Hygrozyme is a genuine innovation in enzyme based products which breaks down old root mass to allow for and stimulate new growth. Manufactured in an entirely unique way, Hygrozyme offers growers a number of advantages over competing products
all seems to work out pretty costly compared to regular CHEMICAL hydro nutrients
and who knows how well it will work, its a gamble i haven't been prepared to take yet
the organic full complete liquid tomato food in the local garden center is looking more attractive its only £2.99