50 gallon drum, how many "aquarium gallons"

[Millepora_Maniac]

Originally Posted by corpusse

Either your barrel is not 50 gallons or you tank is not 90 gallons. While many aquarium manufactures use the outside dimensions for calculating gallons, it's not going to be that far off.

Ihis is a 50 gallon food grade barrel. the tank is a 90 reef ready, 4 by 18 by 24...

on my 180g, it was drained nearly to half way, there is something weird about this, and i think it has to do with conversion or something.

I'm far from a greenhorn dude, lol