icecap k1-50 skimmer icecap the icecap k1-50 is a remarkably compact skimmer that offers a new level of refined filtration for marine aquariums ranging from 40 to 80 gallons. all aspects of the skimmer were implemented to surpass many challenges other skimmers on the market misses out on. for aquariums up to: 80 gallons, light bio load; 60 gallons, medium bio load; 40 gallons, heavy bio load. in-sump installation only. dcair-700 dc pinwheel pump. distinctive turbulence reducing body. footprint: 4.75" x 3.5". total height: 19". solid pvc & acrylic construction. bubble dispersant chamber. novel pipeless output valve. recommended sump water height: 6" to 9".