refugium, assuming a normal to heavy fish load in the main aquarium?
<... depending... on how much life of what sorts in the main tank, and LR there... not that much... Assuming you use crushed coral sand in the main tank, maybe a third full (a couple hundred pounds) with macro-algae growth over it (another third of depth) with likely the last, upper third air/void to accommodate transit volume (for water if/when the power goes off, pumps are off...)> I look forward to your reply. Thanks and regards, Steve Walker
