Deltec 6000i Internal Protein SkimmerAquarium size 3000 to 6000 liters THIS IS A SPECIAL ORDER ITEM AND TAKES 4 6 WEEKS IF OUT OF STOCK Deltec have been a market leader in specialist marine equipment for over 25 years. These new internal protein skimmers continue their long history of German hand built, high efficiency protein skimmers. They have used their experience to introduce many innovations in skimmer technology over the years, pushing the boundaries of performance and efficiency.