Quote:
Originally Posted by chris127
so if 9L is about 20lbs... and 6L is about 13lbs.... do you think i can cover it with 6L? i'll probably end up getting another 3L to be safe...
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Well, it depends on the depth of substrate you want. If you wanted an average of 3" of substrate, you'd need 18"X10.5"X3" = 567 cubic inches = 9.3L
With an average of 2", it would take right around 6L