where they come from, it snows sometimes during the winter. I have had some Argentina pleco out door here in California during winter, where the water dips into the 40s for a few years now.Wes, my tank runs 60-72F depending on the time of year. Is this too cold for Luteus long term? I may start upping that temp to 78-80 for a few months in the summer, but for the most part it's the ambient temp of my basement.