Best conditions for raising spotted salamander eggs?

[Sneersh]

I recently acquired two masses of spotted salamander eggs that were salvaged before a nearby vernal pool was destroyed. The eggs are currently outside sitting in a plastic tub in about 5 gallons of water. I was wondering what the best temperature is for raising them. The current water temperature is about 60 degrees during the day and as low as 40 at night. Is this too much fluctuation? If I were to bring them inside, the water temperature would be consistently in the low 70s, but I'm worried about fungal growth. Also, how deep should the water be, and how long will they take to hatch at these temperatures? If you have any other tips I'd be grateful.

 

[Bellabelloo]

I keep mine in an unheated shed, by the window. The temperatures are roughly the same . at them moment. I have mine in a tub with a depth of maybe 4'' water. This has free floating pond plants and snails, I also like to have a few beech or oak leaves in as they can help prevent fungus. The water came from the adult's water section and I added pond water, this is because it should hold some micro food for when they hatch. I find development very slow and you'll find they hatch over a long period of time. Bringing them into a warmer room will speed development. When the larvae hatch you will need a good supply of micro food. I like to use micro worm, very small daphnia and at a push freshly hatched brine shrimp.