What to do when aquarium plants get holes?
Often, in the beginning, you observe only small dots on a leaf. After some time these turn into clearly visible holes. Often these are black or yellow bordered.
If this is the case, you should definitely check the potassium concentration in the aquarium by means of a water test. Because this element is often responsible for holes in the plants. If the concentration of potassium is too low, it can be increased by targeted fertilizing.

Likewise, animals in the aquarium such as snails or fish can be responsible for holes in plants.