For what it's worth

[baron902]

I recently stripped down by flat back hexagon 110 gallon acrylic tank. Felt like coming up with a new display.

I always wondered just how much water was really in the tank, considering that it had in lots of rock and sand. I use natural sea water, so I normally travel to the beach with 4 x 6 gallon and 1 x 5 gallon gasoline cans, that's a total of 29 gallons when I do a water change.

Seeing that I was filling the tank to maximum capacity this time, just water, no rock or sand yet, I decided to see just how much water this 110 gallon tank really holds. I made 3 trips to the beach, and the tank filled to max capacity after pouring in 87 gallons. I guess you can figure out what all this means when it comes to adding supplements and chemicals to the water based on tank capacity. Can certainly screw things up.

[Chuck S]

You probally lose some water volume based on the hexegon shape. I know rectangular tanks are pretty darn close. If I have a 225 gallon tank rectangular the actual water volume is something like 224.415 gallons