Well as some of you may or may not know I have been saving for a 240G. well I have most of the tank money saved, and have been buying other things like heaters and sand ect for it as I have money. This way on my birthday when I get the tank I can just set it up. I will run a sump and a canister, and will house all the fish that are in my 55 sig.
Fluval bio-max is measured in grams. I get the 500gram box's as it always available. For my 90gal i use 12 boxes(6000grams) contained in two canisters. I needed 12 boxes. I pay $12.40 per box(not sure what it costs where you are) so a total of almost $150 just for my media. Bio-max is great for HOB or canister filters, but if your using a sump or wet/dry, i'd go with bio-balls(still get the pro look) 12 boxes of bio-max is around 2 gallons. You would probely need more than that.