As some of you know, I've been a bit enamored with this unusual livebearer species since I discovered them about a month and a half ago on Aquabid. Well, I bit the bullet and bought an unsexed group. Now, since they are so new to the hobby, not a lot of info is available on them. There are some who still think that they are one-handed fish - folks think that for breeding, the males can only use their gono on one side and the females can only accept the gono on one side. This is not true, and is probably due to them being slow breeders compared to most livebearing fish. Well, I've been doing a lot of research on them. They are coming next week and I want to have a great tank home set up for them, so I was looking at a biotope tank. After a quick look on Fishbase, which I trust as a fairly reasonable, scientific source regarding fish habitats, I have decided to construct a Lower Rio Uruguai habitat. I will be using a 15 gallon Clear for Life tank with a solid deep blue backdrop (the fish are white, so a dark backdrop is a must). A bit of research has yielded two plants I'll be including - broad leaf sagittaria and echinodorus uruguaiensis (uruguay sword). I'll be looking for more plants native to the area (if you know of any with reasonable evidence that they occur in the lower rio uruguay, I'd be very interested to know about it). The tank will receive mostly natural light, but I may add a small light fixture if I find the plants need it. I'm currently researching fish collecting expeditions in the area to see if I can find any references to specific plants that they noticed, and found in this research that corydoras hastatus and otocinclus cats are VERY common in the densely vegetated areas of the streams, lakes, and the rio uruguay itself, and will very possibly include some of these fish in the tank once I select a trio of the staple fish. Probably either a trio of Otos, or a shoal of 7-8 cories. The substrate for the tank will be Azoo's plant substrate. I'll be adding a heavy leaf litter and some driftwood and mosses (assuming I can verify the presence of fissidens sp. in the lower uruguay - if not I will probably open up a few marimo balls and attach them to the wood instead). I am still in the research phase as far as planting and tank setup, and finding info isn't easy, but I figured I should start the thread and get the ball rolling with you good folks.