Deficiency

[graf]

Hi guys!!

Please take a look at the picture. What kind of deficiency is that? Red Temple is the only plant in the tank showing this symptom. Calcium for curly leaves but those scratches.
Later all scratches are getting bigger and leaves are falling apart.
What could it be?

 

[savga]

Could be potassium deficiency which can cause thin weak leaves. If calcuim is lacking, magnesium may also be lacking. My water is very soft and I had the same problem with plant growth. Instead of trying to supplement calcuim, etc. I started adding RO Right with water changes which brings up Ca, Mg, and kH in a balanced way similar to river water. My plants responded well. For potassium deficiency you need to add potassium chloride or potassium sulfate.