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  • How many gallons is this tank

    74" around x 25 1/4" H,

    This is a hexagon tank.  Can anyone tell me how many gallons it is? \

    Thanks!
    Michael
    Clear Lake, TX

  • #2
    Re: How many gallons is this tank

    What is the measurement from one flat side to the other flat side?

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    • #3
      Re: How many gallons is this tank

      If it is 74" all the way around, I took that and divided it by 6 for the sides.  And if you say that it is 25" and some change.  Looks like about 42 gallons according to the calculator on Aquariumlife.net.  Hope that helps.

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      • #4
        Re: How many gallons is this tank

        +1 for 42 gallon

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        • #5
          Re: How many gallons is this tank

          thank you very much for the help
          Michael
          Clear Lake, TX

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          • #6
            Re: How many gallons is this tank

            Ask Tim (armthe homeless), he is a math teacher.  It would take some time to seperate the hexagon into triangles, squares, and rectangles.
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            • #7
              Re: How many gallons is this tank

              Or you could always cheat and use the calculators online....lol.

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              • #8
                Re: How many gallons is this tank

                hex volume

                6W = 74"
                H = 25.25"

                Volume = 3Wsq x H x .00433g/cuin = 50 gallons

                For actual volume, use inside dimensions (not outside dimensions)
                'Dear Lord,' the minister began, with arms extended toward heaven and a rapturous look on his upturned face. 'Without you, we are but dust ...'
                He would have continued but at that moment my very obedient daughter who was listening leaned over to me and asked quite audibly in her shrill little four-year old girl voice, 'Mom, what is butt dust?'

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                • #9
                  Re: How many gallons is this tank

                  The Phreek beat me to it.  

                  Formula for a REGULAR hexagonal prism(where each side is the exact same length and each internal angle is the same) is perimeter times apothem times height divided by two.

                  So we get:
                  V = 74 *(74 / 12) * sqrt3 * 25.25 / 2 =
                    = 9980.6815 cubic inches
                    = 9908.6815 cuin * .00433gallons / cuin = 43.216 gallons
                  Scarecrow : I haven't got a brain... only straw.
                  Dorothy : How can you talk if you haven't got a brain?
                  Scarecrow: I don't know... But some people without brains do an awful lot of talking... don't they?
                  Dorothy: Yes, I guess you're right.

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                  • #10
                    Re: How many gallons is this tank

                    Now I have a bonus problem for the final for my geometry students tomorrow. (They already found the number of gallons for my classroom aquarium using this method)
                    Scarecrow : I haven't got a brain... only straw.
                    Dorothy : How can you talk if you haven't got a brain?
                    Scarecrow: I don't know... But some people without brains do an awful lot of talking... don't they?
                    Dorothy: Yes, I guess you're right.

                    Comment


                    • #11
                      Re: How many gallons is this tank

                      haha thanks guys
                      Michael
                      Clear Lake, TX

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                      • #12
                        Re: How many gallons is this tank

                        oops, my mistake

                        should be

                        Volume = (cos 30) x 3Wsq x H x .00433g/cuin = 43 gallons

                        Volume = 2.6 * Wsq x H x .00433g/cuin = 43 gallons

                        thankyou professor
                        'Dear Lord,' the minister began, with arms extended toward heaven and a rapturous look on his upturned face. 'Without you, we are but dust ...'
                        He would have continued but at that moment my very obedient daughter who was listening leaned over to me and asked quite audibly in her shrill little four-year old girl voice, 'Mom, what is butt dust?'

                        Comment


                        • #13
                          Re: How many gallons is this tank

                          :wink:
                          Scarecrow : I haven't got a brain... only straw.
                          Dorothy : How can you talk if you haven't got a brain?
                          Scarecrow: I don't know... But some people without brains do an awful lot of talking... don't they?
                          Dorothy: Yes, I guess you're right.

                          Comment


                          • #14
                            Re: How many gallons is this tank

                            I just did the volume for a cylinder, divided by 231 (cubic inches per gallon) and rounded down to the next "normal" hex tank size.

                            (74/(2*3.141))^2*3.141*25.25/231 = 47.5 gallons

                            Lots easier

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                            • #15
                              Re: How many gallons is this tank

                              So is it a 42, 47 or a 50? haha
                              Michael
                              Clear Lake, TX

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