I still see nutrient deficiency!Updated 2 months ago

Unlike our skin, old plant leaves do not heal. So the older leaves will not recover even if the nutrition is now optimal.

New leaves however should be in general larger and more vibrant. For most stem plants, wait for the new, stronger leaves to develop then consider topping and replanting that portion.

There are many other factors that affect plant growth form and color, including CO2 sufficient and stability and the biological maturity of the tank. Plants react to a large range of environmental variables - substrate zone issues, competition with adjacent plants, access to light, space and CO2. If you are dosing nutrients regularly, it is very likely that the poor growth forms are caused by other factors.

To read more in-depth on diagnosing nutrient deficiencies head here.