How much Flourite Black Sand for 20G High? - The Planted Tank Forum
 
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post #1 of 13 (permalink) Old 05-25-2010, 11:22 PM Thread Starter
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How much Flourite Black Sand for 20G High?

Could anyone recommend how many bags of Flourite Black Sand I should be getting for a 20G High? Technically the tank in question has a tiny bit more surface area than a normal 20G High (it's about 1.5 inches deeper front to back than normal). I would be aiming for about 2" of sand.

I know there's a substrate calculator, but it's only for Flourite, not Flourite Sand, and I'm not sure if the Silica Sand in the calculator would be the same weight as Flourite Sand.

Thanks,
Harry
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post #2 of 13 (permalink) Old 05-25-2010, 11:38 PM
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I'd get 2 bags. You'll have some extra, but I don't think one bag would be quite enough.

Plus extra substrate = perfect reason to set up another tank...





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post #3 of 13 (permalink) Old 05-25-2010, 11:51 PM
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I'd do one bag. You don't want to go super deep with sand.
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post #4 of 13 (permalink) Old 05-25-2010, 11:52 PM
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+1 on 2 bags, if you don't want one more tank i'd say get 3" of substrate.


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post #5 of 13 (permalink) Old 05-26-2010, 01:03 AM
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i just setup a 30xhigh which is essentially a 20h bottom dimensions, I used 2 bags flourite sand and I wouldnt call it super deep so definitely get 2 bags.
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post #6 of 13 (permalink) Old 05-26-2010, 02:35 AM Thread Starter
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Quote:
Originally Posted by jwm5 View Post
i just setup a 30xhigh which is essentially a 20h bottom dimensions, I used 2 bags flourite sand and I wouldnt call it super deep so definitely get 2 bags.
How deep was it (in inches or cm)?

Thanks.
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post #7 of 13 (permalink) Old 05-26-2010, 03:05 AM
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Def 2 bags....
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post #8 of 13 (permalink) Old 05-26-2010, 03:26 AM
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Def 2 bags agreed.

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post #9 of 13 (permalink) Old 05-26-2010, 03:40 AM
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2 bags..


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post #10 of 13 (permalink) Old 05-26-2010, 03:46 AM
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Quote:
Originally Posted by lauraleellbp View Post
I'd get 2 bags. You'll have some extra, but I don't think one bag would be quite enough.

Plus extra substrate = perfect reason to set up another tank...
Your horrible! but ya ... 2 bags.

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post #11 of 13 (permalink) Old 05-26-2010, 11:44 AM Thread Starter
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Thanks for all the comments. Two bags it is. I thought I might have needed 3 bags but it seems like 2 will be plenty I guess.

Thanks,
Harry
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post #12 of 13 (permalink) Old 05-26-2010, 03:36 PM
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Here is the general formula for figuring out how much substrate you need:

L x W x D for the volume you want of substrate. All measured in inches.
This is length x width of the tank times the depth of substrate. If you want hills and valleys average it, and get a little extra.
Then... How does the bag measure? Cubic inches? Cubic feet? Gallons? Quarts? Pounds?
You got the answer in cubic inches.
Divide by 1728 for cubic feet.
Multiply the cubic feet by 7.5 for gallons
There are 4 quarts in 1 gallon.
Most of the heavier substrates such as sand and gravel, and the heavier plant substrates that are based on similar material weigh pretty close to 100 lbs per cubic foot. Lighter material such as some potting soil (too much organic matter for aquariums) and things like Soil Master Select are only about 1/2 as dense.

So... lets say the tank is 12" x 20" and you want it 2" deep.
12 x 20 x 2 = 480 cubic inches.
.277 cubic feet (call it 1/4 cubic foot)
2 gallons
8 quarts
28 lbs of heavier product
14 lbs of lighter product.
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post #13 of 13 (permalink) Old 05-26-2010, 03:47 PM
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Quote:
Originally Posted by Harry Muscle View Post
How deep was it (in inches or cm)?

Thanks.
2" in front maybe 3" in one of the back corners, it also sounded like your bottom dimensions were a little wider than a normal 20h so you should be safe with 2 bags to give about 2"
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