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 Post subject: Forum-Use Acronyms
PostPosted: Mar 2nd, '07, 11:07 
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Forum Use Acronyms

BOD – Biological oxygen demand

BP – Barrelponics (see System Glossary)

CF – Compact fluoro

CF – Continuous Flow (see System Glossary)

CHIFT PIST - Constant Height In Fish Tank, Pump In Sump Tank

DFT - Deep Flow Technique (see System Glossary)

DI - Deionisation

DO – Dissolved oxygen

DOC – Dissolved organic compounds

DWC – Deep water culture (see System Glossary) also DFT - Deep Flow Technique

E&F – Ebb and flow (see System Glossary)

F&D – Flood and drain (see System Glossary)

FRC – Floating raft culture (see System Glossary)

FT – Fish Tank

GB – Grow beds (see System Glossary )

GH – General Hardness, caused by divalent metal ions, primarily calcium and magnesium. (see Water Hardness and Fish Health )

GH – Green house

HPS – High pressure sodium lighting

IBC – Industrial / International / Intermediate bulk container (see Hardware Glossary)

KH – Carbonate Hardness, due to carbonate / bicarbonate ions, and represents the main 'buffering capacity' of the water, i.e. its ability to resist pH changes. (see Water Hardness and Fish Health)

LC50 – Lethal Concentration 50 usually used for gases in air or in the case of fish concentration in water in ppm. The 50 represents a 50% mortality in test subjects.

LD50 – Lethal Dose 50 at which 50% of the test subjects died. Is usually stated in mg/kg body weight.

Meg/L - Millequivalents per litre

MH – Metal Halide lighting

NC - Normally Closed (refers to relay contacts) contacts closed when relay has no power applied to relay coil (eg 240v), opens when power on

NFT - Nutrient Film Technique (see System Glossary)

NH3 – Ammonia (see The Nitrogen Cycle & Nitrifying Bacteria Facts for a full description)
(And Ammonia - The Silent Killer )

NH4 – Ammonium, the ionized form of ammonia, which is occurs when the water is acidic. It is not as toxic to fish as ammonia, which is why aquariums that have acidic water do not have as many problems with the initial phase of the nitrogen cycle. Ammonium, the most important nitrogenous fertilizer for water plants, is essential for the breakdown of plant protein.

NO - Normal Output (refers to lighting)

NO - Normallly Open (refers to relay contacts) contacts open when relay has no power applied to relay coil (eg 240V), closes when power on

NO2 – Nitrite (see Nitrite and Fish Health for a full description)

NO3 – Nitrate (see Nitrite and Fish Health for a full description)

PC - Power Compact Lights

pH - acidity or alkalinity of a substance (see Fish Health and pH )

ppm – Parts per million

ppt - Parts per thousand (i.e. one gram per 1000g or 1Kg per 1000L)

RAS - Recirculating Aquaculture System

RFF - Radial Flow Filter

RO - Reverse Osmosis

RSG - Really Smart Guy filter, discussed here

SG - Specific Gravity, meaning the salinity (salt) content of your water.

SHO - Super High Output (refers to lighting)

SLO - Solids Lift Overflow

SOG - Sequentially Operated Growbed (contact Ellkaybee for more information)

SUF - Static Upflow Filter

TBPC - Tri-Based Pelletized Carbon

UGF – Under Gravel Filter

UPS - Uninterruptible Power Supply

UV – Ultra Violet

VHO - Very High Output (refers to lighting)

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