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reef93 10-09-2011 03:25 AM
Need help from someone with good math
 
After reading Blinks's poll about sand or no sand, I have decided to put the sand back into my reef tank. I want no more than 1" of sugar sand, just enough to cover the bare bottom look and to have a wrasse fish in the future. Live sand is expensive, I don't want to spend more money than I need to, but I can not figure out how much sand I need for my 48" long with 18" width. Can someone with good math tell me how many lbs of sand do I need for my tank ?
Thanks for your help.

Blom 10-09-2011 03:39 AM
Quote:
Originally Posted by reef93 (Post 641563)
After reading Blinks's poll about sand or no sand, I have decided to put the sand back into my reef tank. I want no more than 1" of sugar sand, just enough to cover the bare bottom look and to have a wrasse fish in the future. Live sand is expensive, I don't want to spend more money than I need to, but I can not figure out how much sand I need for my 48" long with 18" width. Can someone with good math tell me how many lbs of sand do I need for my tank ?
Thanks for your help.
Volume = 48 * 18 *1
= 864 Cubic inchs

Wet sand has an approx density of 0.0694 lbs/in3 (Note this is just a google on wet sand density, I have no Idea what the actual caribsea live sand density would be but I could guess it would be in this ballpark)

Which makes approx 60 lbs.

But if you looking to save money why buy live sand... just buy sand.... it will become "live" in time.

Aquattro 10-09-2011 03:39 AM
Google sand calculator for aquarium, lots of hits...

Blom 10-09-2011 03:41 AM
Math is more fun :crazy:

babyreef 10-09-2011 04:02 AM
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reef93 10-09-2011 04:03 AM
That was a quick help :biggrin: thanks guys. I guess I will go get 60lbs of sand. Live sand is over $100 for 60 lbs, if dry sand is not too much the difference in price at J&L, I had just better get live sand without going through the hassle of rinsing.

reef93 10-09-2011 04:05 AM
Quote:
Originally Posted by babyreef (Post 641576)
Pick any number from 1-9

X it by 3

Now Add 3 to that number

Now X that number by 3

Now take that number (eg. 11) and add the (digits) numbers (eg. 1+1) (eg. 1+1=2)

Post your answer here
Are you kidding me, I didn't even completed high school. I have no idea
about this :redface:.

babyreef 10-09-2011 04:09 AM
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reef93 10-09-2011 04:13 AM
I pick number 3 and the answer came number 6.
Hey, don't laugh if I am wrong :biggrin:

babyreef 10-09-2011 04:22 AM
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Blom 10-09-2011 04:23 AM
See math is fun lol

babyreef 10-09-2011 04:38 AM
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babyreef 10-09-2011 04:40 AM
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reef93 10-09-2011 02:40 PM
Quote:
Originally Posted by babyreef (Post 641584)
If you picked the number 3...

X 3 = (3 X 3 = 9

+3 (3+9 = 12)

X 3 (12 X 3 = 36)

3+6 = 9

Final answer is 9

See ... I told you I can't do it :redface:

StirCrazy 10-09-2011 03:28 PM
Quote:
Originally Posted by babyreef (Post 641589)
The point is, it doesn't matter which number you pick between 1-9

You will always get the same answer (9). Great bar trick.

Try it with all the numbers between 1 and 9 and you will see math is fun really, just looks intimidating.
thats not math its a bar room trick.


Reef93

if your going to buy two bags grab one more.. just make sure you can take it back if you don't use it. much better to return a bag then have to run buy another one at the last min.

babyreef 10-09-2011 03:47 PM
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Proteus 10-09-2011 03:56 PM
[quote= Great bar trick. .[/QUOTE]

My bar math was always adding 1 more please. Lol

Blom 10-09-2011 04:40 PM
Quote:
Originally Posted by StirCrazy (Post 641629)
thats not math its a bar room trick.


Reef93

if your going to buy two bags grab one more.. just make sure you can take it back if you don't use it. much better to return a bag then have to run buy another one at the last min.
Addition is math yes :lol::lol::lol:

Besides that this is great advice, I cant tell you how many times Ive had to run to a LFS for a wee bit more of something. Or better yet Home depot for one more 90 degree PVC joint.

StirCrazy 10-09-2011 06:04 PM
Quote:
Originally Posted by Blom (Post 641654)
Addition is math yes :lol::lol::lol:
yes it is math but pointless math or if you rather entertaining math..... hence bar tricks. and in no way did that bar trick formulae relate to the question posed by the OP. :wink:

Steve

babyreef 10-09-2011 06:25 PM
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StirCrazy 10-09-2011 10:51 PM
Quote:
Originally Posted by babyreef (Post 641672)
Correct.

And yours was much better, basically I have no idea so just buy a bunch of it and take back what you don't use, brilliant!

really... come on now.. the math was already done and it was determined that about 2 bags should do it.. I said buy 3 just incase...

if we really wanted to we could have got a random sample of the sand he was planning on using, taken an average crossection volume then applied that to the volume to be filled.. but why.. so we could give a bag count to three decimal places.. get real and get over that not everybody things bar math is entertaining.

Steve

babyreef 10-10-2011 02:38 AM
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reef93 10-10-2011 02:44 AM
Quote:
Originally Posted by babyreef (Post 641751)
This might help http://www.aqua-
calc.com/calculate/gravel-rectangular-solid

No more calculating for me :mrgreen: I hate math since I was in grade 6. I will just get one extra bag as Titus99 and StirCrazy said, but I will make sure I can return it later if I don't need it.
Thanks for the link, anyway.


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