For a couple years I have been using this DE scoop that was supposed to hold a pound. Today I filled it and weighed it, found out it really only holds only 3/4 lbs.

Doesn't seem to have been tragic but I have been undercharging my DE filter for a couple years now.

FYI - This scoop is blue plastic and roughly 5 1/4" deep and 4 3/8" wide at the top. If you have one similar you may want to double check what it measures for you.