Green Phoenix Farms Iron Chelate (FeDTPA 11%) is the finest product available, and is absolutely proven to be safe for both fish and plants in Aquaponic Systems.
You will know that you are in need of Iron for your system, if the new growth on your plants show a distinct yellowing. Usually this will be seen as yellow tissue between the veins of the leaves, and sometime as a yellowing of the entire leaf.
FeDTPA Iron Chelate 11% is most available to plants for root uptake if your system water has a pH above 5.5 and below 7.5.
Please note US shipping only at this price!!! Please email us if you need shipping outside of the US.