Thinking about adding a Mexican dwarf crawfish to my 29 gallon i just put together. Has anybody had any luck with them? Current stock is 7 cardinal tetra, 5 eques pencilfish, 5 ember tetras, 3 endlers, 3 ghost shrimp, and 1 amano. I know I am bit stocked but I can always move things around with my other aquariums. This tank has been running for about a month now.