Hey voaters. I have been playing with hydroponics for about a year now, and for a long time I had serious issues with root die-back. It took me longer than it should have to figure out what the heck I was doing wrong. So I figured I would share my experience for any people new to hydroponics.
For a long time I was doing a weekly water change with no top-ups in between in my deep water culture systems. This seems to have been the source of my issues. I also have tinkered with Kratky non-circulating hydro for lettuce, and my issues didn't follow me there. So this got me thinking.
The principal behind the Kratky method is that some of the plant's root mass are doing water/nutrient uptake, while the roots above the water line are taking up air.
So, I thought, what if I am drowning roots that have become used to taking up air? With this theory I decided to top up more frequently, every one to two days. Sure enough the root die-back issue stopped.
So for those of you who are new to deep water cultures make sure you keep up with your top-ups!