Aquaponics Unhappy peas

I think my peas are officially unhappy.

They appear to be slowly losing their grip on the business of growing, staying alive, and making me peas.

Interestingly, this leads me to a question I'll be asking but not answering right away, because I'm yet to find out.

There are a few plant diseases that, once your garden contracts them, render your patch useless for that type of plant for some number of years.

It occurs to me that the soil must get infected.

It also occurs to me that I have no idea if the same would apply to growing plants in a media like gravel or scoria.

I'll find out.