Hello, i have a problem with my staurogyne repens, yellowing and hole on the leaves, then melt. I check the stem so far so good, so it happens only to the leaves. My tanks is 20 gallon, I dose EI , water change 50% every sunday, CO2 35ppm , 60 Watt LED Light DIY. Maybe someone knew this kind of deficiencies ? Here's the picture.