Keeping constant temperature in darkroom

[Wayne]

For $20-30 you can buy a submersible aquarium heater that will keep a tray at the right temp all night long. I bought a cylindrical 75 watt stainless submersible on sale for $12 a couple weeks ago. It sets partway in the groove in the bottom of an 11x14 tray of water around my 8x10 developing tray, and takes about 2.5-3 liters of water to cover it completely. I start it up 1-2 hours before beginning my session (my darkro0m drops to 50 or below when I'm not in there, I only heat it when I'm in there), or just fill the tray with 68-70 degree water if I'm in a hurry to start. It keeps my developer +/1 degree. Bigger trays or heating multiple trays with one heater may require a small circulating pump and bigger wattage, but this has worked perfectly for me for a couple weeks now.

[Sal Santamaura]

"Where the heck is PA?? The only PA I know is Prince Albert, Saskatchewan..."

For those without a US orientation, PA is the US Postal Service's official abbrebviation for Pennsylvania.