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**TheOldSalt** · 06-07-2005, 10:58 AM

# Egg Layer - Species of fish where the female lays eggs which are externally fertilized by the male. The most common method of fish reproduction. Compare Livebearer.

# External Filter - Any filter that is located outside of the tank, e.g. HOB Filter, Canister Filter.

# FO - Fish Only. Saltwater aquarium containing fish but not Live Rock or Reef animals.

# FOWLR - Fish Only With Live Rock. A saltwater aquarium that contains only fish and Live Rock.

# Ferts - Fertilizers. Nutrients added to the water to improve or maintain health and growth of aquatic plants.

# Filter - A device which removes particulate and chemical impurities from, and circulates aquarium water. See article.

# Filter Media - Various materials used in a Filter which remove particles and impurities from the water by mechanical, biological, and/or chemical means.

# Fin Rot - A condition in which the fins are rotted away giving the appearance of ragged, split, or perforated fins.

# Fish-haver - One who has fish in home aquaria, without purposeful consideration for the fish's health or wellbeing.

# Fish-keeper - One who has fish in home aquaria, and tries to maintain optimum conditions for the fish.

# Fishless Cycle - To Cycle an aquatic system without live fish, using chemical or household ammonia, or decaying material such as fish food or a piece of shrimp to promote the establishment of nitrifying bacteria (as Biofilm). See article.

# Flaring - Spreading out the gills and fins as a form of Display. The Betta splendens is known for his display of flaring.

# Fluorescent Lighting - A relatively cool, energy-efficient artificial light source. Produced by gas discharge (ionization) in a low-pressure tube. The recommended and most common type of lighting used for aquaria. Compare Incandescent.

# Fry - Fish larvae (baby fish).

# GH - Total Hardness (also referred to as General Hardness). A measurement of the amount of magnesium and calcium dissolved in water. Expressed in degrees of hardness. One degree of hardness equals 17.9 ppm. See also Buffering Capacity, Hard Water and Soft Water.

# GPH - Gallons Per Hour. The rate at which a filter turns over x amount of Gallons in one hour. For example, a filter that turns over 150 gph will filter 100% of the water in a 10g tank 15 times in one hour.

# Gallon - When used on this site without qualification, usually refers to the US Gallon, equal to 3.785 Liters. The UK Gallon is equal to 4.546 Liters.

# Gonopodium - Modified Anal Fin in male Livebearers, used to transfer sperm to females.

# Gram-negative/Gram-positive - Named after Danish physician Hans C.J. Gram. Bacteria stained with colored dye according to Gram’s method are designated Gram-negative when it does not hold the color, and Gram-positive when it retains the color. Some antibiotics are more effective against Gram-negative bacteria, while others are more effective against Gram-positive bacteria. Broad-spectrum antibiotics treat both Gram-negative and Gram-positive bacteria.

# Gravel Vacuum - 1. A device made of a large diameter rigid tube attached to a smaller diameter flexible hose. Used to clean gravel Substrates by siphoning water and debris from the gravel during a Water Change. 2. The process of cleaning the Substrate by means of the Gravel Vacuum.

# Gravid - The condition in which a female fish is full of eggs and ready to Spawn.

# Gravid Spot - Dark marking which can often be distinguished at the rear of the abdomen of female Livebearers (Platys in particular) indicating advanced pregnancy. What is seen are the embryos, particularly their eyes, showing through the female’s abdominal wall.

# Green Water - Water with a green appearance due to free-floating Algae.

# Grow Out Tank - A separate tank into which Fry are transferred until they grow to a size suitable for sale, or until they are large enough to be moved back into the aquarium with adults.

# HO - High Output Fluorescent lighting.

# HOB Filter - Hang On Back Filter. An External Filter which is hung on the back of the tank.

# HOT Filter - Hang On Tank Filter. An External Filter which is hung on the tank. Some are not intended for permanent installation, but only for short-term use, and are placed in front or on the side of the tank.

# Haplochromine (Haplochromis) - Any cichlid from the African Rift Lakes and certain other regions currently or formerly belonging to the Haplochromis genus (often abbreviated to Hap). An example of a haplochromine group formerly classified under Haplochromis but currently under a different classification is the genus Astatotilapia.

# Hard Water - Water which has a high concentration of dissolved minerals and solids.

# Herbivore - One that eats mainly or only vegetable foods.

# Hospital Tank - A separate tank in which sick fish can be isolated from the main tank population while undergoing treatment. See Quarantine Tank.

# Hybrid - A cross between two or more different species.

# Hydrometer - An instrument used to measure salinity by Specific Gravity.

06-07-2005, 10:58 AM	#7
TheOldSalt Darth Ichthyos Join Date: Jan 2005 Posts: 4,358	# Egg Layer - Species of fish where the female lays eggs which are externally fertilized by the male. The most common method of fish reproduction. Compare Livebearer. # External Filter - Any filter that is located outside of the tank, e.g. HOB Filter, Canister Filter. # FO - Fish Only. Saltwater aquarium containing fish but not Live Rock or Reef animals. # FOWLR - Fish Only With Live Rock. A saltwater aquarium that contains only fish and Live Rock. # Ferts - Fertilizers. Nutrients added to the water to improve or maintain health and growth of aquatic plants. # Filter - A device which removes particulate and chemical impurities from, and circulates aquarium water. See article. # Filter Media - Various materials used in a Filter which remove particles and impurities from the water by mechanical, biological, and/or chemical means. # Fin Rot - A condition in which the fins are rotted away giving the appearance of ragged, split, or perforated fins. # Fish-haver - One who has fish in home aquaria, without purposeful consideration for the fish's health or wellbeing. # Fish-keeper - One who has fish in home aquaria, and tries to maintain optimum conditions for the fish. # Fishless Cycle - To Cycle an aquatic system without live fish, using chemical or household ammonia, or decaying material such as fish food or a piece of shrimp to promote the establishment of nitrifying bacteria (as Biofilm). See article. # Flaring - Spreading out the gills and fins as a form of Display. The Betta splendens is known for his display of flaring. # Fluorescent Lighting - A relatively cool, energy-efficient artificial light source. Produced by gas discharge (ionization) in a low-pressure tube. The recommended and most common type of lighting used for aquaria. Compare Incandescent. # Fry - Fish larvae (baby fish). # GH - Total Hardness (also referred to as General Hardness). A measurement of the amount of magnesium and calcium dissolved in water. Expressed in degrees of hardness. One degree of hardness equals 17.9 ppm. See also Buffering Capacity, Hard Water and Soft Water. # GPH - Gallons Per Hour. The rate at which a filter turns over x amount of Gallons in one hour. For example, a filter that turns over 150 gph will filter 100% of the water in a 10g tank 15 times in one hour. # Gallon - When used on this site without qualification, usually refers to the US Gallon, equal to 3.785 Liters. The UK Gallon is equal to 4.546 Liters. # Gonopodium - Modified Anal Fin in male Livebearers, used to transfer sperm to females. # Gram-negative/Gram-positive - Named after Danish physician Hans C.J. Gram. Bacteria stained with colored dye according to Gram’s method are designated Gram-negative when it does not hold the color, and Gram-positive when it retains the color. Some antibiotics are more effective against Gram-negative bacteria, while others are more effective against Gram-positive bacteria. Broad-spectrum antibiotics treat both Gram-negative and Gram-positive bacteria. # Gravel Vacuum - 1. A device made of a large diameter rigid tube attached to a smaller diameter flexible hose. Used to clean gravel Substrates by siphoning water and debris from the gravel during a Water Change. 2. The process of cleaning the Substrate by means of the Gravel Vacuum. # Gravid - The condition in which a female fish is full of eggs and ready to Spawn. # Gravid Spot - Dark marking which can often be distinguished at the rear of the abdomen of female Livebearers (Platys in particular) indicating advanced pregnancy. What is seen are the embryos, particularly their eyes, showing through the female’s abdominal wall. # Green Water - Water with a green appearance due to free-floating Algae. # Grow Out Tank - A separate tank into which Fry are transferred until they grow to a size suitable for sale, or until they are large enough to be moved back into the aquarium with adults. # HO - High Output Fluorescent lighting. # HOB Filter - Hang On Back Filter. An External Filter which is hung on the back of the tank. # HOT Filter - Hang On Tank Filter. An External Filter which is hung on the tank. Some are not intended for permanent installation, but only for short-term use, and are placed in front or on the side of the tank. # Haplochromine (Haplochromis) - Any cichlid from the African Rift Lakes and certain other regions currently or formerly belonging to the Haplochromis genus (often abbreviated to Hap). An example of a haplochromine group formerly classified under Haplochromis but currently under a different classification is the genus Astatotilapia. # Hard Water - Water which has a high concentration of dissolved minerals and solids. # Herbivore - One that eats mainly or only vegetable foods. # Hospital Tank - A separate tank in which sick fish can be isolated from the main tank population while undergoing treatment. See Quarantine Tank. # Hybrid - A cross between two or more different species. # Hydrometer - An instrument used to measure salinity by Specific Gravity.