[new-2-the-reef]

yes it is a canister filter eheim..i was told that befor that it might cause some problems with nitrate in the future..I will have to constantly clean it?
Im pretty sure it has media in it already..
why did they recommend it at the aquarium store?
should i get rid of it and just use the skimmer?
the lighting i have is a odyssea 48'' 4 -led ,atinic, daylight on a timer
12000k 65watt each bulb 4 all together