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Glossary, Acronyms and Abbreviations.


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


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.
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