[quote="Cyara"]nutrients created by the worms for the plants and perhaps in this way not need to add anything to the system... ie. chelated iron... or seaweed plant food.

that is all i use in my system

worms/vermicastings and vermitea i brew and the fish food and waste
add calcuim and iron every now and then
worms go very well with aquaponic's
never used anything else