All of the sudden this show up on most of my crypts except for Bullosas. I have not changed my fertilizing dosage for 3 months or so because I have it set to automatic dosing of modified EI.
About two weeks ago, I added 1/2 inch of used aquasoil and osmocote root tabs to each crypts. Other than that, nothing has changed in the tank.
From my research, I read over APC that I have calcium deficiency but I when I did addition researched. I found another article/image that it looks like it is Manganese.
My water is cleveland city water which is hard water.
So what is my deficiency?
Image from APC