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
hereSG - 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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Backyard Aquaponics
