Pinholes in my Crypts and a bit on my Java fern/Anabius

[Mr. Fish]

So from I understand Pin holes is usually caused by potassium deficiency. I have dry ferts but at the moment only dose Seachem Comp and excell with pressurized co2.

I thought comp was a balanced fert, why am i showing potassium deficiency?
Or any deficiency for that matter ?

My tank is 10gal with a 40w fixture on it


Thanks