Change from 3" enclosure from 8.75" to 11.75", how much weithg to add?

Blue Robotics Products Watertight Enclosures
1

Good day Support,

I just replace the 8.75" (3" diameter) enclosure to the 11.75", Question?

Approx how much weight I would need to add as ballast?

regards
Luis

2

Google says a 3" diameter cylinder 3" long is 21.21 cubic inches and that much of water weighs 12.26 ounces, but the longer tube weighs an extra 5.29 ounces, so I think that means you’ll need to add about 7 ounces.