I am still in awe with my new skimmer.. working so good I can't believe I allowed myself to use the Remora on my tank for so long. Then went pretty much skimmerless for a month, so it is playing catch up, along with cleaning the rocks, I am filling my cup every 2 days with black chunky absolutely foul smelling stuff. Never got anything close to that out of my remora. On Saturday after I cleaned some of the rocks I had to empty my skimmer twice that day, and it was still almost black in color.
Here is a question about skimmers in general and a mistake I think I made with my Remora that I won't make again. I don't see this advice posted either. I used to use a bottle cleaner type brush to clean my remora cup, and the tip of the brush left quite a few scratches in the neck from doing that. No way I could get my hand in the neck to clean it. I think the scratches in the neck really negatively affected the performance of the skimmer, what do you think? I am only using my hands to clean the cup on my new skimmer... nasty stuff for sure, but I don't want any scratches on my new skimmers neck. I wash my hands real good after cleaning of course.
And back on topic... do you have any definitive way to find out the cause of your skimmer doing that? ie. would looking at some skimmate under a microscope tell you anything?