I have a 10 gallon freshwater tank that is cycled and ready to go! I presently have 3 long finned zebra danios ( taken from my 75g) to keep things going in the tank. It is lightly planted so far with java fern, but I have intentions to add more of the same plants. Snails are already introduced and doing quite well, judging from the number of the little darlings. The substrate is sand and there are a few pieces of driftwood to divide up the swimming areas. My question is: I would like to put in a dwarf puffer or two, and would like to know what I could add with them. The danios are going back to the big tank. I was thinking of something that could stir up the sand a little bit as I am concerned about anaerobic bacteria. Are kuhli loaches a possibility? If so, how many would be ideal?