Marineland Penguin 100 Power Filter Black, 100 GPH Saltwater The ratio chart below is

The ratio chart below is designed for RO water where there is generally no buffering capacity

Takes a more "true" water saple at a 6 inch depth

 FiltoSmart 300

Provides natural cover to help create a more calming and healthy environment

Marineland Penguin 100 Power Filter Black, 100 GPH Saltwater The ratio chart below isAll Penguin Bio Weel Power Filters deliver easy, three stage mechanical, chemical and biological aquarium filtration. Convenient Penguin Rite Size Filter Cartridges come ready to use with each filter. ready to mechanically and chemically remove waste, discoloration and odors. Each contains new faster actiong Black Diamond Premioum Activated Carbon for maximum efficiency. Biological filtration is provided by the revolutionary and patented Bio Wheel