how 2 work out the gallonage of a particular size tank

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Andyneored5 - 28 Sep 2003 17:37 GMT

hey..

Whats the sum...

Thx

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Brian - 28 Sep 2003 18:29 GMT

L x W x H in inches divided by 231

A gallon of water is 231 cubic inches

> hey..
>
> Whats the sum...
>
> Thx

Reply to this Message

Def Lizard - 28 Sep 2003 19:25 GMT

Re: how 2 work out the gallonage of a particular size tank

Group: rec.aquaria.marine.reefs Date: Sun, Sep 28, 2003, 5:29pm (PDT+7)
From: novinger@epix.com (Brian)
L x W x H in inches divided by 231
A gallon of water is 231 cubic inches
Andyneored5 wrote:
hey..
Whats the sum...
Thx
*****************************************************
Its L x W x H of the _inside_ measurements and height to the bottom of
the top frame (or if acrylic) 2 inches below the top (where the water
line would be) divided by 231. This would give you the capacity of an
_empty_ tank.
Better yet take outside L x W x H ÷ 231 x .75 (this will give
you an _accurate_ gallonage capacity taking into account displacement by
objects in the tank [sand bed, rocks, heater, power heads, etc.] and the
water level is _not_ to the top of the tank!) Taking the LxWxH ÷ 231
gives you the amount of water the tank would _displace_ if it were a
sealed box immersed in water and _not_ its water capacity! Ciao!

http://community.webtv.net/deflizard/doc
regards, John

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Brian - 30 Sep 2003 04:13 GMT

>
> Re: how 2 work out the gallonage of a particular size tank
[quoted text clipped - 18 lines]
> gives you the amount of water the tank would _displace_ if it were a
> sealed box immersed in water and _not_ its water capacity! Ciao!

Sorry, you caught me in a mood :) Your *better yet* could be way off.
Temp glass is usually thinner then plate glass,1/2 inch glass or 1/4
inch, just right there you have a total of 1 inch. Having 10 lbs rock
compared to 100, 2 inch sand bed compared to 6 inch. There are to many
variables to just use .75. If this was to figure out an exact gallons
for medicine or for water changes I would drain the filled tank into 5
gallon buckets and then mark the side of the tank for how many inches it
drops for every 5 gallons.

Again don't take this as a flame. I am a recovering analytical myself.
The best advice someone gave me was: If a person asks you what time it
is, that is all they want to know. They don't need to know how the clock
works

>
> http://community.webtv.net/deflizard/doc
> regards, John

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Bob Phelps - 28 Sep 2003 21:40 GMT

Check out ReefCentral.com -- they have calcultors for everything.

> hey..
>
> Whats the sum...
>
> Thx

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Pet Forum / Aquaria / Marine Reef / September 2003

how 2 work out the gallonage of a particular size tank