Premium DC16 Protein Skimmer for Saltwater Aquariums – Efficient Marine Tank Filtration System for Reef & Fish Tanks – Perfect for Home & Office Aquarium Maintenance

EDIT: Although it appeared that the company might help me figure out the problem, they never followed up and left me stranded otherwise I would give a 5 star review. I finally figured out why the skimmer would not consistently work and was very erratic, either overflowing or too far down the cup to product anything.In the process of trying everything I could think of including setting the water height to 9" as suggested in the literature, I finally started adjusting it up and down until I found that it takes 10.5 inches of water column for it to work properly. Once I set that level, it has worked perfectly for about 2 months now. So If you understand that, then his skimmer is an excellent skimmer. But do not expect the company to be very helpful at all.I left the original review below.I finally got connected to the person who takes care of issues with the skimmers. So far it looks promising. Once this process is complete I will give more info and a correct star rating above according to how my issue is handled.DUSGUSTING!I purchased this product and from day one it has been very inconsistent. When tuning it in it will skim for a day or two and then the water column will either fall back or begin to overflow like crazy. So I'll re-tune it in and in a few hours the same thing happens over and over again ad nauseam! ABSOLUTELY NO HELP FROM THE DISTRIBUTORS.