Hi, I changed the substrate! I think it looks more natural. I decided I was going for a carpet and heavily planted tank so I am going thursday at my LFS to buy more plants.
Before:
last update, I added hygrophila polysperma and ludwigia from my 55 gallon tank, also cryptocoryne and spiky moss that is there for now to grow so I can put it one day in my 55 gallon on the wood when there won't be fungus.