15!? How can you live with that!
We Finns start crying out loud if it drops below 23 . Always well-insulated houses and central heating for every room... And if it gets over 24, then again we start crying it's too hot.
Well anyway, at 23,5 C it works very fine. I used Tetenal mono for 1 min (dev) + 45 sec (blix), and now Kodak RT-LU replenisher for 2 min (dev) + 2 min (blix) and everything remains same: exposure, filtering and results, except that Tetenal produced a little bit more contrasty image, Kodak is better and gives little bit more definition to dark areas. And Kodak blix works and doesn't stain paper .