Bacteria minimum temperature?

[Spar]

I currently have my live rock sitting in bins in my garage. I have 300w heaters in each but with the recent cold weather I am sure it stays pretty cold in the water.

So two questions:
1) at what point is water temp too low for bacteria to live?
2) will temp swings adversely effect the bacteria?

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[dfwtek]

I doubt you will have a problem, Remember that some oceans are fairly cold and some people set up cold salt water tanks for things from the pacific North West and a lot of the creatures there live in water that is around 50 degrees.... I would imagine that the bacteria would be fine at 40 to 50 degrees, However I doubt any pods, bristle worms or other larger beneficial creatures living in the wholes of your live rock would make it as they are used to warmer waters.... But I am just making a educated guess... You would be surprised at how tuff some of the smaller creatures are.

 

[Heath]

Well, this may not be applicable at all, but I will throw it out there just for grins.

In food handeling, anything below 40 degrees will slow the growth of bacteria (and eventually stop the colder you get). Anything above 140 is when bacteria starts to become damaged and die off.