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How much dirt?

9K views 4 replies 3 participants last post by  roadmaster 
#1 ·
So I'm planning to dirt my 75 and I'm realizing I have no idea how much dirt I should actually have :S

So basically, how much dirt should I be expecting to use for an entire 75 gallon tank? Is there a calculator that exists out there or something? I forget the size that the bags come in (I'm either going to do Miracle Grow Organic Potting Mix or one of the other organic potting mixes I've used in the past) and have no idea how many of them I would need.

I'd also rather only make one trip to the store to buy my dirt lol
 
#2 ·
L x W x H = volume.
Length of tank in inches times width of tank in inches times the depth you want.

Then it depends on how the soil is bagged:

If it is labeled in cubic feet: there are 1728 cubic inches in one cubic foot
If it is labeled in quarts: there are just about 57 cubic inches in one (US) quart.

example:
If your 75 gallon is 4' long, 2' wide and you want substrate 2" deep:
48 x 24 x 2 = 2304 cubic inches.
divide by 1728 = 1-1/3 cubic feet.
or divide by 57 = 40-1/2 quarts.
 
#4 ·
Really? That's interesting on the sand as I was under the impression (given that calculator on here) that I'd need like 100lbs of sand :S

Thanks for the idea of how much dirt to get guys!
 
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