How many gl does my tank hold?

[::pete::]

I see how Jim got his and its definitely closer than my guess.

[NaCl_H2O]

Regular Hexagon Volume = H*(sqrt(3)/2 * W*W)
W = Distance front to back between flat edges
H = Height

Here is a link


Not taking into account glass thickness I get 30.67 gallons

[SaltyJim]

Grom what I remember, Oceanic made 2 smaller (<50gal) hex tank sizes. 42gal is the larger, and the one you have desctribed is the 30gal. If it truly is Oceanis, then with those dimensions, it is definitely 30gal.

Jim

[Ram_Puppy]

sounds just like my tank, not sure, I think it's a 30... it's been 'fun' keeping it stable.

[Richard]

No way! I wondered why it was so hard to keep tabs on the maintenance. I did use any tools, devices for measuring but I also kept it in my mind that I was told a 35 hex. Umm, do you think I can go back and get some more tank to make up the difference for what we paid??

A very common error is thinking that a 55 gallon holds 55 gallons or a 20 gallon holds 20 gallons and so on. Manufacturers base the tank size on outside dimensions rather than inside dimensions. As others have said, you have to use inside dimensions to figure out how many gallons they actually hold.

Bummer...I just figured out that my 215 only holds about 190 gallons which means I still have never owned a tank over 200 gallons. :x

[Richard]

Here's a calculator for Hex tanks:
http://animal-world.com/encyclo/info.../calculate.htm

It says 32.79 gallons based on 6 sides 10" wide and 25.25" tall.

[texasranchers]

Thanks everyone for the replies.

I understand about the interior/exterior deminsions, I didn't need exact. I was just amazed that after hand filling my tank with the RO water from the supplier, that I had 10 gl left over.

Yes, it really is an Oceanic, I left the little sticky on the bottom trim.

This has been very beneficial. Thanks again and I'll check out the links.