too cold for dojo loaches?

[Phoenixphire55]

I just moved to a new house and when its cold outside it gets horribly cold in my house. Sucks for me, but it works for coldwater fish which is what I have. However, my tank which at the moment only houses 3 dojo loaches (soon to be more like 6 loaches plus some cloud mountain minnows maybe) and I just looked at the thermometer which reads 62 degrees. I think it probably gets even colder at night, 58 or lower. How low is too low for loaches? Should I put a heater in the tank for the winter?

 

[Etunes]

They can handle down to 50 degrees and up too about 77 or 76 degrees. So yes they should be fine.