I'm trying to get into hydroponics and have started with peas as it's winter in in Wollongong, Australia.
However I've had an ongoing issue ever since planting them a week ago. I haven't seen much growth at all and constant wilting of the leaves. They were in rock wool in a running water setup that remained saturated and so I thought over-watering might be an issue so I've taken the rock wool out and now they are just sitting in the clay balls with the bottom of their roots in the running water. Also when taking out the rock wool I noticed that the roots are trimmed with brown now.
I bought an air pump a couple of days ago thinking that it may have been an oxygen issue but I haven't seen any results since having installed it in the reservoir.
I'm a beginner and everything I've read on the net points to over-watering however everything I have tried hasn't worked.