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water volume: 55 vs 40b

845 Views 8 Replies 4 Participants Last post by  NateFank, 
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last night I "upgraded" to a 40b over the existing 55 due to location it was being placed as well as nicer dimensions.

In doing the switch I used all the water, substrate, plants, driftwood, filter and heater from the 55. I just previously placed that tank there with water level right below the rim.

Now after placing everything was placed in the 40b, the only remaining thing was a 6gal ace hardware bucket not even filled all the way.

I always knew the listed gallons were not exact but damn, water. Volume is no longer a pro IMHO anymore for the 55 over a 40b. I honestly didn't have any more excess water laying around.
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jeremyTR
I read here that 40b's are actually around 45gals. Not sure how accurate that was.

But I think 40b's are way better than 55s. So much wider. It's awesome.

Sent from my HTC Evo 4G
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NateFank
I just did the math and a 40B is actually 47 gallons. I actually didn't know it was 47 gallons. Why don't they call it like a 45 gal?
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brainwavepc.com
math proves this false.

55g is 48x12x21 =12096 cubic inches.
40b is 36x18x16 =10368 cubic inches.

they are pretty close but the 55 is def more volume.
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brainwavepc.com
231 cubic inches in a gallon so its actuly about 52 gallons and 44 gallons
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NateFank
A 40B is actually 36x18x17 which equals 11016 cubic inches. Divided by 231 equals 47.688 gallons. I just measured my 40B to make sure the dimensions were correct. If you really wanna be picky you could take off 3/8 th's of an inch off the height, for the inside lip of the rim where you would actually fill the tank to.
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brainwavepc.com
Oh well I got dimensions from a tank size chart on another site, but yeah you get the idea. In summary 40b are nice tanks
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jeremyTR
Top tier!
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NateFank
Why are they called 40 gallon breeders if they are closer to 45-47 gallons? Why not 45 breeder? I actually thought it was 40 gallons till I read this post and did the math
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