You can get the pot when you KNOW it's dry and weigh it.

Water weighs 8 pounds to a gallon....so you can determine how much water is in there at anytime you want.
HARDDON Reviewed by HARDDON on . Hardonna update... Figured I'd just throw up a pic each week of Harddona. Bag seed; 100w CFL's for veg; 18 hr. light; small fan; good potting soil, with no added nutes. Because I talk to her, she's already the strongest looking of 12 sisters. Rating: 5