This is, to the best of my knowledge, an Echinodorus parviflorus. It was in my main tank before I rebuilt it, and now it is in this improvised plastic tank, where I keep some plants for storage purposes. In the main tank it wasn't particularly good looking, but at some point it even sprouted three new plantlets. For the longest time, I cultivated these plantlets in this same plastic tank, and they grew much better than the mother plant did in the main tank. However, at some point, they all took a turn for the worse, and started growing stunted curled leaves, which became progressivelly worse until I gave up on the plants.
Now this original plant, one of the two I had in the main tank, went to this plastic tank and actually improved for a few months. And now the same thing happened again, it started growing curled stunted leaves.
Back when I had the first three plants that died, I used to dose this tank pretty heavily and I assumed I may have killed them with some sort of excess. This time around, I was basically changing the tank's water with water from my main tank, so feeding it with whatever excess happened to accumulate on the main tank inbetween water changes. And I dose this main tank with what I consider to be a mid-range for ferts.
This plastic tank has a small homemade internal CO2 reactor and is fueled with yeast CO2. There is a circulation pump attached to an internal filter. Some of the other plants, like the Althernanthera mini also in the picture, are also not particularly happy, but they are not dying either. Some of them are even doing good.
GH is around 6 dGH and KH around 0.5 dKH.
As a final comment, something very similar happened to an Echinodorus flame and in the end it also died. This is going to be the 5th Echinodorus that dies this way if I don't figure out what is happening.
Now this original plant, one of the two I had in the main tank, went to this plastic tank and actually improved for a few months. And now the same thing happened again, it started growing curled stunted leaves.
Back when I had the first three plants that died, I used to dose this tank pretty heavily and I assumed I may have killed them with some sort of excess. This time around, I was basically changing the tank's water with water from my main tank, so feeding it with whatever excess happened to accumulate on the main tank inbetween water changes. And I dose this main tank with what I consider to be a mid-range for ferts.
This plastic tank has a small homemade internal CO2 reactor and is fueled with yeast CO2. There is a circulation pump attached to an internal filter. Some of the other plants, like the Althernanthera mini also in the picture, are also not particularly happy, but they are not dying either. Some of them are even doing good.
GH is around 6 dGH and KH around 0.5 dKH.
As a final comment, something very similar happened to an Echinodorus flame and in the end it also died. This is going to be the 5th Echinodorus that dies this way if I don't figure out what is happening.