i have this plant in a 75 gal. high light,co2 ,and pmdd. all plants in the tank r doing very well except this plant what do u think is goin on .btw its the bottom part thats rotting but the upper part of the plant is flourishing.thanks in advance
I used to grow this plant too (3wpg in a 55g), but I too suffered from bottom parts dying and mid/top parts doing fine. I'm pretty sure this occured because not enough light was reaching the bottom portions. I noticed a shading effect, mostly due to other plant growth, so IMO, it cut off light to the bottom portion. Too bad too, such a nice looking plant.
This plant did better for me when I was careful to plant single stems, with enough room for light to reach the bottom. But, it never did continue to do well, so I got rid of it. This was years ago when my knowledge of fertilizing and CO2 was minimal.