Thanks for the replies.
Not much in it at the moment; a dozen rosy tetras, 2 megalechis thoracata (or whatever hoplos are called now) and 8 brochis splendens.
The wood is tea tree that I stripped and cleaned to give it kind of a flooded forest feel.
The plants are sitting in aquabasis under the sand, but not very much of it as I transferred it and the plants from an old tank about half the size. I was using fertiliser and liquid CO2 back then but haven't bothered to since I moved everything into the new tank 6 or 7 months ago, and I still have to prune pretty regularly to stop it getting completely out of hand.
Here's another shot taken today where you can see the mass of floating plants on the right. Not sure what those are or how they got there, either...