how many gallons

[candy]

hi if someone can work this out for me that would be wonderful..iv tryed using the thing in the pinned topic but i cant work it out not the smartest cookie today.

how many gallons would a 7x2x2 foot tank hold

thanks so much
candy

 

[The-Wolf]

209.45 US gallons of air
200 gallons of water after displacement of substrate etc.

 

[candy]

thanks so much for that