Temp. low while curing for about 18 hours...

I got my live rock yesterday and started the curing process at about 6pm. When we left, the water parameters were fine, 1.021ish salinity and temp. around 74 F. Last night I checked on the temps, and one had dropped to about 70F, so i turned the thermo up a bit and went to bed.

This morning I checked the temp again, and it had dropped to 68. I am thinking now that I've just been turning the damn knob the wrong way, so i turn it back the other way a bunch and head to work. I had my wife check the temp later and it was still 68.

I'm wondering if this low temperature is going to permanently harm my rock. I have a brand new heater to get the temp back up, so hopefully no lasting damage will have been done.

 

well hopfully it should be ok, the little buggers will most likly pull through...he its darwinism at its finest good luck and best wishes