Around a month ago this aquarium was set up (image 1) the Cyprus Prolifera you can see in the back left corner was mostly dormant to begin with. We planted it around 45cm below the water line (which sources of info online say is fine for it), over the next 2-2.5 weeks it rapidly shot up new shoots and seemed to be doing well. However over the past week the stems at the bottom are yellowing, and the tops are going somewhat dry (withering?) before the stem just breaks loose from going soft. I am unsure what is causing this. I have ensured the roots are getting nutrients and there are plenty of ADA iron bottom long around its base, the two gen 4 freshwater radions are run on 30% for around 8.5 hours a day.
Image 2 is the Papyrus just before the stems started yellowing, and imagine 3 is plant now.
The tank parameters are as follows:
Temp: 28 degrees celcius
I have since increased my dosing to increase nitrate levels (I was only dosing at around 1/3-1/4 the dose on the bottle as that is what I was recommended at the start
I was performing water changes twice a week as I have heard that is the best way to avoid algae in the beginning. Could this be the problem? I am since cutting back to once a weekOr a lack of nutrients? Not enough light? I’d greatly appreciate some advice as I really enjoy this plant in the setup.