Honest question, odd story

So, I occasionally have a dream where I got to an LFS to which I've never been. Everything is normal at first, but then I get to tanks of murky colored water with strange, unnatural creatures in them. This dream fascinates me every time it occurs.

My questions is, what oddball fish could I keep in water tinted with almond leaves/peat water? I'd like to have driftwood and plants (fake) so that the fish would kind of fade into view from the dark water from between the wood & plants. The fish in question would be homed in a 47g bow front tank.

Are there any active eels or the like I could use for this application?

I already have 2 bichirs, a retropinnus and senegal, so I don't really want more of them. As for gouramis, I have a 55g full of 'em.

I'll have to do a bit of research. If I get it rolling, I'll make sure to get some pics.

I used to do this with a tank:

Fill a pillow case halfway with peat moss and fill it with water.Shake and knead then squeeze. I did this until I had a 5 gallon bucketful. I then let it set overnight for fine particulates to settle out and pour the water off. I added the water to the tank when doing water changes. The water would be cloudy for a couple of hours, but would clear up to a brownish orange color.

Shy fish seem to love it because it keeps them from feeling so exposed.