BOD – Biological oxygen demand
CF – Continuous Flow
DO – Dissolved oxygen
DOC – Dissolved organic compounds
DWC – Deep water culture
FRC – Floating raft culture
FT – Fish Tank
GB – Grow beds
GH – General Hardness, caused by divalent metal ions, primarily calcium and magnesium.
GH – Green house
IBC – Industrial / International / Intermediate bulk container
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)
NFT – Nutrient Film Technique (see System Glossary)
NH3 – Ammonia (see The Nitrogen Cycle & Nitrifying Bacteria Facts for a full description)
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.
NO2 – Nitrite
NO3 – Nitrate
pH – acidity or alkalinity of a substance
ppm – Parts per million
RAS – Recirculating Aquaculture System
RFF – Radial Flow Filter
RO – Reverse Osmosis
SG – Specific Gravity, meaning the salinity (salt) content of your water.
SLO – Solids Lift Overflow
SUF – Static Upflow Filter
UGF – Under Gravel Filter
UV – Ultra Violet
Aquaculture – The controlled cultivation and harvest of aquatic plants or animals (eg, edible marine algae, clams, oysters, and salmon).
Aeroponics – a hydroponic technique involving the use of sprayers, nebulizers, foggers, or other devices to create a fine mist of solution to deliver nutrients to plant roots.
Aquaponics – the integration of aquaculture and hydroponics.
CHIFT PIST – Constant Height in Fish Tank, Pump in Sump Tank – One method of running a system to ensure that the fish tank water level won’t fluctuate. Also makes it unlikely that the fish tank will run dry if the pipes break or some other crises occurs.
Blue drum – 200L plastic drum used in many areas of aquaponics. Can be cut in half vertically or horizontally to give two 100L grow beds. Care needs to be taken when obtaining these drums that toxic chemicals have not been stored in them. Depending on the previous use of the drum, they may be successfully cleaned and used in your system.
Crenellations – cover a greater surface area compared to a series of drilled holes and thus lets a greater water flow through, holes are more prone to clog.
Fish-safe silicone – It forms a tough waterproof seal that won’t crack or shrink, and is non-toxic to fish when fully cured after 7 to 14 days. Cure time depends on bead size and cure conditions.
Float switch – an electrical switch used to turn pumps on and off during pumping cycles.
IBC – Industrial / Intermediate / International Bulk Carriers, 1000L, usually 1000mm x 1000mm x 1000mm (approx.) plastic cubes used to transport bulk liquids by road or rail. They are usually white / translucent and contained within a steel or aluminium cage on a pallet. Care needs to be taken when obtaining these ibc’s that toxic chemicals have not been stored in them. Specialist fittings are often required to couple to the tap in the bottom of the ibc.
PVC Pipe – PVC stands for Polyvinyl Chloride.
CPVC Pipe – CPVC stands for Chlorinated Polyvinyl Chloride.
ABS Pipe – eans Acrylonitrile Butadiene Styrene.
PEX Pipe – PEX stands for crosslinked polyethylene.