Hi there, I am doing some experiments for my research project and I need to grow hydroponically some Pak Choy. I
used 1/2 strengh Hoaglands solution in a 7 Litres tray. I aerate through air coming from inlet and I have pH around 6.3 as recommended. Problem is that the plants are not surviving.
I first germinated the plants in Vermiculite and then rinsed the roots and put them into the tray . 6 plants for 7 Litres trays. The pH changes very much and I needed to adjust first with around 6mL 1M KOH and then adjust the next days with quite a lot of H2SO4 to maintain pH 6.3-6.5 I use UV light around 8 hours a day to provide them light.
1) they still die. And by dying they actually shrink and the stem becomes weak and then the whole plant dies. In the same time the leaves shrink and retract themselves.
2) Some yellow things are growing in the water, it seems like an algae is growing, is that a problem? I am very annoyed because it seems my setting was quite good and now it just doesnt work... My plan was to change the water every week but none of the plants made it so far...
Thanks for any recommendation or help