Wait, you have a skimmer and a canister filter? (Your reply was unclear to me) If that's the case, just disconnect the canister and find someone with a freshwater tank that will use it. They're basically useless for saltwater, except possibly to run carbon once in a while.
If you do have just a canister, I would look into getting a protein skimmer to replace the canister filter with. There are many that will tell you that you don't need to run a skimmer, but after seeing the sludge that mine pulls out, I won't ever run a tank without one personally