I started out my tank with an amazon sword plant, which did really well after the above-water leaves died away and new under-water leaves grew. Recently, I purchased two anubias frazeri, one anubias nana petite, and one dwarf sagittaria sublata. The frazeri are both loosing leaves increadibly fast, gaining brown spots on some leaves, or growing completely transparent and either dark brown or yellow.
Today, I noticed that the sagittaria sublata was also getting some brown spots, and the amazon sword started to lose leaves again.
I'm working with a five-gallon fluval chi that sticks around 76 degrees. I add Aqueon aquarium plant food every week, along with aquarium salt and seachem prime when I do water changes. (50%, twice weekly) I also use daylight replicating lights in my room.
Does anyone have any experience with this sort of problem, or any advice? :(