Wait... what do you mean by "filtration"?
The type of "filtration" you will use highly depends on what you're going to keep in this tank. If you EVER going to turn this tank to a reef (and believe me you will

) than it's better off starting without any filtration other than Live Rock and skimmer later on. Thus if you have some bio-filter - either remove it completely or in case of bio-wheel remove media and wheel and use it just for water movement (and on ocasions you can use it to throw in carbon to clarify the water, but for a short period).
If you're 100% sure that you're going to make this tank Fish Only (no corals that is). Than you can use some bio filters (bio-wheel for example etc).
So, tell exactly what do you have in your tank and how much

?
I.e. do you have Sand?
Do you have Live Rock?
Other rock?
Plants (throw plastic away immediately

)?
etc.
Also give us more details about your tank - size, how many powerheads you have in it, what kind of heater(power), what type (wattage) of lighting - the more details you give the better answer you'll get.