77a8cecc_Reefkeeping_Acronyms__STANDS_FOR
[ACRONYM] BTU [WHAT IT IS] Unit of energy equal to about 1 055.05585 joules. It is approximately the amount of energy needed to heat 1 pound (0.454 kg) of water 1 ?F (0.556 ?C) [STANDS FOR] 
British Thermal Unit
Reefkeeping Acronyms
STANDS FOR