Welcome Lanshark! You could try having the driftwood on a different angle so it's sitting lower on the substrate, at the moment it's very open under there and also it looks kind of unnatural. Other than that just more plants and/or wood. Your java fern will provide plenty of cover when it gets large. I managed to find a little piece of driftwood on the beach which makes a perfect fish cave. I like the yellow water (and I'm sure your rams do too).
