It will cover the bottom, but if you want to have plants(which I assume you do since you are buying ecocomplete) you are going to need roughly twice as much.
Darn, I am sorry, it is not Petmountain it's PETCO.i can't even find eco on pet mountain
I have no clue but, you can call PETCO and ask.and 15.99? shipped? will it ship to canada? and if so i should order 8 bags from there and take the stuff i bought back