Backyard Aquaponics
A place to discuss aquaponics

These are okra plants. In a tank with say 10 or 12 small cichlids, some South American (maybe Central) convict cichlids and some royal blue peacock cichlids. The plants are right on top of aquarium, suspended in net pots. Only filter is a hamburg matten filer (powered by air) that keeps ammonia and nitrites at zero at all times so far as I can tell. Nitrates also seem to be at zero, I think you guys/gals will tell me at least some of the below symptoms are evidence of low nitrates.

Anyways, looking at the photos below, what nutrients would you guess are missing? The dark green leaves going to light green, especially between the veins, leaves curling up, etc.

Thanks, and I tried to resize the pics, let me know if they are still to big!

Note, you can see they are actually starting to grow okra pods at this point, still very small obviously. But just FYI.