Bio-Fil 2 Good choice for fresh or saltwater fish and coral reef tanks. Bio-Fil 2™ Wet/Dry filters include Bio-Pin Balls® for highly effective biological filtration and increased areration. This design incorporates an efficient drip plate for full distribution of water over the bio-media, a larger biological chamber than other brands, a post filter sponge, and an expandable sump to accommodate protein skimmers or other filtration accessories. Quality craftsmanship and rugged acrylic construction make this unit easy to install, and fits most pre-filters. Note, models 182, 240, and 360 have two each inlet bulkheads. Gals L x W x H Bulkhead Price   60 g 20 x 8.5 x 16 1" 1.5" $214.25 125 g 24 x 12.5 x 16 1" 1.5" $265.25 180 g 30 x 12.5 x 16 1" 1.5" $331.25 182 g 30 x 12.5 x 16 1" 1.5" $344.25 240 g 36 x 12.5 x 16 1" 1.5" $362.75 360 g 36 x 12.5 x 20 1" 1.5" $484.25