50 gallon drum, how many "aquarium gallons"

[Millepora_Maniac]

Originally Posted by WarDog

https://www.matthewb.id.au/converter...alculator.html

Thanks! according to this, the drum is approximately 50g, so does that mean that the tank itself is not really 90g?

This has always baffled me.

like i said, my 180 nearly got drained to halfway for a water change, and my 90 was within 5" of the bottom of the tank (Yes, i realize there is some rock in there) but not that much! I also had to pull 1/3 of the water out of the 65 gallon that is plumbed into this system... I feel like i am pumping out 100 "aquarium gallons" and adding only 50 "Barrel gallons"

There has to be some explanation, since this 50 gallon barrel is standard size, i am assuming our aquariums are actually not holding as many gallons as they state.

interesting....