Store it in the room housing your betta so its temperature is the same as the bettas jar. It makes it safer when you change his water. If you only have one betta, bottled water might be a good way to go. For those of us who are way past 50 bettas, bottled water is not even an option.
The average person litters 4.4 pounds a day. 29 pounds a week. And 1,600 pounds a year! That is enough to cover Texas 2.5 times.
Females have litters up to twice a year (the father always skips town!). Babies, typically 5 to 8 in a litter are ready to leave mommy's pouch and walk around out on their own by 4 months of age. That's when they are 7 to 9 inches, nose to rump, and weigh about 10 to 16 ounces. But 'possum life is rough! Very few survive to become adults.