The lake is very well done. The terrain arround the lake is not as well as the lake. I believe it looks better, if you make some gras and some stones in different colours arround it and some more plants. The red bush is a little too red. If you paintet it in darker colours it will come out better. Overall a really cool terrain. With a little more work it would be looking better. :)
The banks also need to be wet-looking - like mud. The swamp ITSELF is ok, but it looks like the resin/PVA/water effect you used hasn't drier fully before you took the photograph. The foliage looks ok, but the red sponge looks a bit odd :P
The murky water is cool. A few things could be improved as well. I think the dirt would look better if it was darker in colour and looked wetter. That plant lying on its side in the water looks a bit off. And the red lichens that you've used really look like lichens. There might be something you could do to camouflage their true nature better, or you could just use miniature plants like you did for the rest of the vegetation here.