I think it would be cool to make a tank that imitates the natural environment of what was lake xochimilco and lake chalco. does anyone know what kinds of things lived in these lakes? plants and animals? And things that you could purchase in a store or online. I have been searching but i can't find anything about what lived in the lakes. so far i think mollys may be a possibility since i have found they are native to brackish water in mexico (sounds like xochimilco to me). i have also found a type of algae that was eaten by the aztecs as a delicacy.. spirulina algae which i found you can get online. any other tips and suggestions??