R - Aquarium and Fish Dictionary
- Reef Tank :
- is a type of saltwater aquarium that is used to keep saltwater corals and other invertebrates. The reef tank often requires much higher lighting and more pristine water conditions that a fish-only or fowlr aquarium. Live rock and live sand is used as a food source for many of the invertebrates in these systems and as the primary biolical filter. Temperature, Salinity (specific gravity), pH, Calcium and alkalinity are some of the constantly monitored parameters in reef tanks since the organisms can be more difficult to keep than fish. Since reef tanks use much more intense lighting than standard fish only or fowlr tanks, nitrates and phosphates need to be kept at extremely low levels to prevent algae from growing all over the aquarium. Reef tanks are the ultimate setup for many hobbyists, but they can be very expensive and challenging to setup and maintain. RESEARCH is your best friend if you're interested in how to set up a reef tank.
- Refractometer :
- there are several different types of refractometers, but for our purposes it is a device or piece of aquarium equipment used to measure the salinity of water. You place a drop or two of aquarium water on a prism and then while pointed at a light source, you view through the eye piece on the other end of the refractometer (opposite the prism) a reading of the salinity level. As the light passes through the water and prism it is bent or refracted. These refractometers are considered more accurate than the less expensive hydrometer because they can be recalibrated easily using pure water such as Reverse Osmosis or Distilled water.
- Refugium :
- is usually a separate tank that is inline or connected to the main aquarium, but it doesn't have to be connected. A refugium is used to grow and harvest organisms (plants and animals) for feeding the animals in the display tank. The refugium is separated from the main tank because these organisms would not be able to grow their populations because of predation in the main aquarium. These animals are protected in a place of "refuge", hence the term refugia or refugium. By being inline or connected to the main tank, the refugium can be a place where you can grow beneficial macro algae that can aid in nutrient export from the system. You could also use the refugium as a place to grow macro algae and periodically cultivate it for feeding to your Tangs or Surgeonfish. Essentially, refugiums can be anything that you want them to be.
- Respiration :
- is the process fish use to extract oxygen from the water in order to live.
- Reverse Osmosis :
- is a water filtration process where water is pushed through a semi-permeable membrane. This membrane only allows certain types of atoms to pass through the membrane and stops the "bad" atoms from passing through. Reverse osmosis water can sometimes be 90% more pure than regular tap water. Sometimes an RO unit is used in conjunction with a Deionization filter.
- Ricordea Florida :
- see Ricordea Florida
- RO :
- abbreviation for Reverse Osmosis. See: Reverse Osmosis and Deionization for more information.
- Rock Scaping :
- is the process of decorating or arranging the Live Rock in a saltwater aquarium. Also see Aquascaping
- RTS :
- abbreviation for Red Tail Shark. See the profile and care information for the Red Tail Black Shark.
- RTBS :
- abbreviation for Red Tail Black Shark. See the profile and care information for the Red Tail Black Shark.
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