its its turning yellow u may need some iron which prevents yellow , and decaying leaves
I would suspect a lack of ferts of some sort or light. Remind us of what the ferts regime, substrate and lighting is?
Sam
Thank you guys for the reply.
Sam, I am using root fertilizer (ball like) for most of the taller plants, liquid fertilizer a drop a day. Pic as below:
Substrate is some plain black tiny stone Or sand.
Lighting is 2 X 14W T5 tube and a small light on the right side of the tank.
Everything was alright for months as most of the pics shown... I was away for a week holidays recently and I found that the hair grass and glosso are not good after that.
Just wondering what causes this...