Im no aquatic plant master and i know i dont have the appropriate setup for optimal plant growth but i need some help. My sword plant is starting to decay around the edges of some leaves and i need advice on how to stop this before i lose the whole plant. It's planted in regular gravel with a product called "first layer" under it i think its laterite. up untill now the plant has been doing awsome and its huge compared to when i got it, but now its starting to decay at the edges of some of the leaves. im guessing this is becuz its not getting enopugh nutrients, does anyone have any advice on how to help this plant?

