I purchased some Brazilian pennywort from LFS about a while back ago. At first, their leaves started melting and I thought it was just normal transplant shock; they will grow back fine.
When I checked them out today, I noticed that even their stems are melting! I honestly don't understand what I am doing wrong.
I have a 20L tank that's 12 inches tall with 2 inch deep substrate. I dose root tabs, flourish excel and flourish comprehensive. All dosing as recommended.
I have dual T5NO 36W rated at 6700K, on for approximately 9 hours a day. I have plenty of other plants in the tank: rotala, banana plant, dwarf lily, windelov fern, java moss, cryps, HC, scarlet temple, cardinal plant, water wisteria, ludwigia, etc, and all my other plants are growing just fine.
What's going on with my pennywort?