List of commonly found terms and acronyms you will find on TSB. We have forum terms, reef related terms and a glossary. If anybody thinks of any not on the list please post them to the thread and Ill add them. If anybody comes across a term they dont understand, then add it too the thread and well do our best to answer. I know what you lot are like so I expect some **** taking but any rude or offensive posts will be deleted so dont even bother. I hope this is useful to people. General Forum Terms. ATB: All The Best BTW: By The Way BRB: Be Right Back CBA: Can't Be A**** DKW: Don't Know Why FWIW: For What It's Worth FYI: for your information HTH: Hope That Helps IIRC: If I Remember Correctly IME: In My Experience IMHO: In My Humble Opinion IMO: In My Opinion IYO: In Your Opinion JMHO: Just My Honest Opinion LOL: Laughs Out Loud NP: No Problem PITA: Pain In The Ass PM: Personal Message PMSL: ****** Myself laughing OP: Original Poster O.I.C - Oh, I see ROFL: Roll On Floor Laughing ROFLMAO: Rolling On Floor Laughing My Ass Off SWMBO: she who must be obeyed. SIC: Spelt InCorrectly (sp?): spelling? TTT: To The Top (when bumping a thread) YKW: You Know Who YMMV: Your Mileage May Vary Reef terms:- AM: Aquamedic - manufacturer BTA: bubble tipped anemone CBB: Copper Band Butterflyfish CUC: Clean Up Crew DO: Dissolved Oxygen DE: Double ended - type of halide lamp DI: DeIonised DSB: Deep Sand Bed FO: Fish Only FOWLR: Fish Only With Live Rock FTS: Full Tank Shot FW: Fresh Water GPH: Gallons Per Hour HLLE: Head and Lateral Line Erosion - fish disease HOB: Hang-On Back - hang-on skimmer IO: Instant Ocean - salt K: Kelvin LED: Light Emitting Diode LFS: Local Fish Shop LMB: Lawn Mower Blenny LPH: Litres Per Hour LPS: Large Polyped Stoney - hard coral LR: Live Rock LS: Live Sand MH: Metal Halide - light MJ: Maxi Jet - powerhead MM: Miracle Mud NO: Normal Output - Fluorescent Tube NSW: Natural Sea Water ON: Ocean Nutrition - fish food OR: Ocean Runner - pump O3: Ozone PAR: Photosynthetically Available Radiation - useful light to coral PB: Powder Blue Tang - fish PC: Power Compact - fluorescent tube P/H: power head PPM: Parts per Million PPT: Parts per Thousand RBTA: Rose Bubble Tipped Anemone RO: Reverse Osmosis RTN: Rapid Tissue Necrosis - coral disease SB : Salty Box SE: Single Ended - type of halide lamp SG: Specific Gravity sp: species SPS: Small Polyped Stoney - hard coral SSB: Shallow Sand Bed TDS: Total Dissolved Solids TMC: Tropical Marine Centre - wholesale supplier T5: Fluorescent Tube 5/8 of an inch in diameter T8: Fluorescent Tube 8/8 of an inch in diameter UGF: Under Gravel Filtration UV: Ultra Violet VHO: Very High Output - fluorescent tube V: volts W: watts WS: White Spot (fish disease) WC: Water Change YT: Yellow Tang - fish Glossary. Aerobic: In the presence of oxygen. Alk: (alkalinity), the measure of total ions in seawater which contribute to its pH buffering capacity. Units: dKH or meq/l Anaerobic/anoxic: Absence of oxygen. Ca: Calcium, the substance from which invertebrates build their skeletal structures. Denitrification: The process of converting Nitrate into Nitrogen gas. Carried out by bacterial species in a low oxygen environment. NB NOT in an anaerobic/anoxic environment. Dissolved Oxygen: Another way of describing the amount of oxygen in solution. KH: (K) carbonate hardness Mg: Magnesium, helps in the calcification process of invertebrates and is essential to balance Kh and Ca. NH3: Ammonia Nitrogen, the first toxic stage of the nitrogen cycle. NO2: NitrIte, unstable form of nitrogen and the second stage of the nitrogen cycle. NO3: NitrAte, final part of nitrogen cycle which denitrifies in anoxic conditions and turns into nitrogen gas N2. Nitrification: The process of converting ammonia to nitrite and subsequently nitrite to nitrate. Carried out by bacterial species in an aerobic environment. O2: Oxygen, a measure of the oxygen concentration in solution. PO4: Phosphate, an unwanted nutrient found in tap water etc that feeds slime and hair algaes. pH: Log to the base 10 of Hydrogen ions, or to you and me, the measure of acidity in solution.