How many lbs of hardscape can an aquarium bottom support?

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Very easy to determine how much volume your rocks and substrate occupy. Fill the empty tank up partway, mark the level, put in all the decor (any which way), mark the new level to which the water rises, measure the difference and use it to calculate the volume of water lost to decor, as a whole number and also as a percentage of your tank volume.

By doing so, you will find that...contrary to how much it may seem when you are washing it, moving it, carrying it or lowering it into the tank...you don't really have all that much rock. :)
 
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Midwater said:
Eureka !
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Lol, yes, I know it's obvious...but on MFK, sometimes the most obvious bits of info are treated as though they are breakthroughs that will alter the course of history. :)
 
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IME, when designing rock work with caves etc, it’s always a good idea to create the design on a layout the exact size of your tanks footprint. Much easier to work things out before they are inside a large tank. Unless you have very long arms. Lol
 
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jjohnwm said:
Very easy to determine how much volume your rocks and substrate occupy. Fill the empty tank up partway, mark the level, put in all the decor (any which way), mark the new level to which the water rises, measure the difference and use it to calculate the volume of water lost to decor, as a whole number and also as a percentage of your tank volume.

By doing so, you will find that...contrary to how much it may seem when you are washing it, moving it, carrying it or lowering it into the tank...you don't really have all that much rock. :)
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Good method. More density of rock = more displacement with equal mass. Granite is gonna displace a helluva lot more than say lava rock.

I remember Eureka from seeing it in syndication one winter! I think all the eps are on You Tube. The funny little guy reminds me of Mr. Boffo!

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FINWIN said:
Good method. More density of rock = more displacement with equal mass. Granite is gonna displace a helluva lot more than say lava rock.

I remember Eureka from seeing it in syndication one winter! I think all the eps are on You Tube. The funny little guy reminds me of Mr. Boffo!

View attachment 1544898
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Is Eureka a TV show? I thought it was a reference to Archimedes! :)

Actually, a dense heavy stone like granite will displace less water than a lighter stone. The more dense and heavier the stone, the smaller it can be for any given mass, thus the less it displaces.

A pound of styrofoam would be a huge size and, assuming it's held under, would displace a lot of water. A pound of lead would be just a little chunk and would displace far less.
 
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jjohnwm said:
Is Eureka a TV show? I thought it was a reference to Archimedes! :)

Actually, a dense heavy stone like granite will displace less water than a lighter stone. The more dense and heavier the stone, the smaller it can be for any given mass, thus the less it displaces.

A pound of styrofoam would be a huge size and, assuming it's held under, would displace a lot of water. A pound of lead would be just a little chunk and would displace far less.
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I dont believe that. A friend of mine who weighs 340lbs jumped into a pool and threw half the water out. FACT.
(his big ass drenched everybody)

Eureka is a cool tv series, a Canadian education show if I recall. Had lessons on physics many chapters...

Here it is:
Episode 1 Inertia (youtube.com)
 
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