How Much Soil To Use In Dirted Tank?

[l_l_l]

Hello !
I'm presently trying to set up a dirted tank and am missing one key information..
How much dirt should I buy to put in my 75 gallon tank?
I am planning on using Miracle-Gro Organic choice dirt, but I can only source small bags..
 
http/www.homedepot.ca/produit/terreau-dempotage-miracle-gro-organic-choice/969906
 
How much bags of this should I buy??

 

[attibones]

You want about two inches of soil. I got a medium sized bag and it was enough for a ten gallon and a 40 gallon. It's one pound of gravel per gallon to equate an inch all the way across, but that's a little different with soil because it's looser. That website says they come in ~45 pound bags. If you get one of those it should be enough.

 

[l_l_l]

Thank you for your answer.
I was able to get 2 inches of soil with two 17L bags

 

[attibones]

Good! I'm glad you got it all sorted.