Melody, that is the Poser article that I really give no credit to it. As I said, Dr Breeden did a wonderful job dissecting and discrediting that article. Gonopodial difference is critical for the taxonomic distinction with livebearers and Poser certainly did not show that with his article, and to my knowledge, that difference has not yet been established. As I mentioned, I stumbled on a site that claimed that difference, but I can not find anything to substantiate its claims.

I used to frequently review Ted Coletti's article in TFH regarding Dr Breeden's lecture on the Poeser article. However, I recently stumbled upon a site that now claims a gonopodial difference between Endlers and Wildtype Guppies, can anyone verify this to be accurate?
Thanks

I'm relatively new to livebearers but not new to aquariums at all. I've kept high tech planted tanks, Discus, and Reef Tanks, but ironically I've only ever had a couple of livebearers in the past. I've never really had much interest in them until recently when I started to pay close attention to Livebearers Unlimited in TFH. I've often perused this column, and if something caught my interest I'd read it, however recently I've started to take more of an interest in it and read it regularly every month. I have 4 years of back issues to read through but I am really interested in the possibility of doing livebearers in my new 125gal Natural Planted Tank. My pH is 6.4 (out of the tap) and my KH and GH are both ~1 degree.

Now to my big question. Is it just a myth that livebearers like hard water or is it fact? If so, is my water too soft to have anything survive?