Reef Octopus NW110

[greenstarman]

Does anyone know how much water this holds while running?

4" Diameter.
Reaction Chamber Height - 15 inches.

I'm not good with numbers.

[RichConley]

A=pi*r^2
V=A*H
2"*2"=4*3.14*15=188.4/231=.8 gallons