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Old 07-29-2009, 07:46 PM   #51
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I think he meant that in the tank with live rock and sand there is about 70 gallons of water, but only 30-40 gallons is usable space to the fish.
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Old 07-29-2009, 07:47 PM   #52
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I get what he's saying, I think it's more of a hypothetical set of numbers, basically saying that

[a 75g tank does not mean it has 75g worth of room to swim] Which makes sense in it's own without throwing out arbitrary numbers.
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Old 07-29-2009, 07:49 PM   #53
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I get it, but the numbers aren't arbitrary. They can be calculated. The swimming space thing will depend on the makeup and relative weight (density) of the rock, but that's really the only incalculable value. Forgive me if I'm hung up on this, but 10 years on a sub and trimming the boat leads to no room for errors.
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Old 07-29-2009, 07:59 PM   #54
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I believe he is talking about the water displacement after the rock is added.
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Old 07-29-2009, 08:08 PM   #55
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Water displacement after the rock will only be due to submerged equipment, corals, fish etc. Anything not water placed into water will displace water. The amount is determined by the weight of the objects, not their area.
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Old 07-29-2009, 09:34 PM   #56
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Im no scientist nor do I claim to be a mathematician. They indeed were rough numbers and yes the 30 - 40 gallons of actual swim space was relative to the amount of live rock in the aquarium.
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Old 07-30-2009, 02:44 PM   #57
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Old 07-30-2009, 03:25 PM   #58
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Is this boat going to sink?
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Old 07-30-2009, 03:29 PM   #59
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probably lol
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Old 07-30-2009, 06:29 PM   #60
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Quote:
Originally Posted by thincat View Post
Is this boat going to sink?
Yes, we did sink by design. The tricky part is resurfacing! :p
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