Just after some advice on skimmers, I currently have a Deltec MCE600 "hang on the tank" skimmer, which has been working well since I got it 2 1/2 years ago. However all of a sudden it is not performing adequately and causing serious problems in my tank. The collection cup although containing some detritus is not as full as it used to be, the dirt is collecting all around the sides of the skimmer and falling back into the water to be pumped back into the tank (Not Good!!!).
1. Is there anything I can do to fix it!
2. Should I get a new skimmer.
3. If I should get a new skimmer any recommendations would be appreciated for ones that I can install with a minimum of disruption to my tank.