Cedar is a definite no-no. Pine has less of the noxious chemicals that cedar does, but I'd still consider it a no-no. And any clay based cat litter is a no-no as well.
Have I used pine on my rodents before? Yes. But only for a day till I could make the drive to get aspen. I really don't like anything with a strong smell to be used on my pets or feeder animals.
Pine can be gotten away with if its odor isn't overpowering, but even so after prolonged exposure it can damage the cells of the respiratory tract. It just takes it longer than cedar would. So I just don't take the chance.
Not to mention the smell, but every pine litter brand I've tried is insanely dusty, again another bad thing for rodents. Rodents for all of their perceived hardiness have an extremely delicate respiratory system. And prolonged exposure to fine dust particles from the litter, concentrates any chemicals on the wood directly into the lung. And when you have young mice crawling through the litter, it becomes even more health hazardous.
I would stick to a paper based litter (Yesterdays News, Carefresh, PaPurr), Hemp (Lifemate), or Aspen. All are low dust and chemical free. And only having one 10 gallon tank, a large bag of aspen could last 5-6 months I'd venture to say. So it's just as cost effective.
Btw, I would recommend a 20-gallon long for any single colony of mice 1:1 up to a 1:5. More room for them to get exercise, more room in the event of baby mice, and less of an odor issue. Smaller containers tend to stink up faster.