I took a look at the total volume again and I came up with 519g. I then rounded the number up for the media containers, pipes etc for a 550 total. This of course this doesn't include the QT, ATO tank, or the freshwater guys
. The file is a little hard to read, so some of the numbers might not show properly.
Main tank – 280
Sea Horse tank – 30
Infinity Tank – 30
Frag – 20
Sump – 90
Refuge – 40
Grasses – 29
============
Total volume - 519 rounded up to 550+ for media selections.