BGA - Blue Green Algae
FS - For sale
LF - Looking for
FF - For free
FT - For trade
pH - measurement of acidity and basicility of water (aqueous matter)
GH - General hardness (measure of concentration of minerals in water; specifically calcium and magnesium)
dGH - degrees of general hardness
KH - carbonate hardness; measurement of alkalinity of water
dKH - degress of carbonate hardness
HOT5 - High Output T5 Light (synonymous T5HO)
pleco - plecostomus catfish
aro - arowana
lbw - live blackworm
LED - light emitting diode (type of lighting system)