Some folks claim that 62F is the ideal water temperature for DWC pot grows and temperature above 72 F will cause a lot of unnecessary problems. Water chiller salesmen say this too.
Some problems are necessary and some are not necessary, i.e. colder water (hypothermia) slows metabolism, warmer water (hyperthermia) increases metabolism.
QUESTION: Just what are these “unnecessary problems” that’s actually caused by water temps >72F?