assuming you use Sunlight as your (free) light source..
while i won't say its impossible..
i highly doubt a very sizable reef tank is possible...
without either a HUGE investment in a Natural thermodynamic cooling process(and sometimes even this is NOT possible depending on your geographical location and/or seasonal changes IMO)
or a HUGE investment in solar/wind/hydro to compensate for serious electric consumption..
must be nice to be rich if cost is no object to this "green" reef setup..
cause it will cost ALOT.. and would hope to be as Simple as it is "green"..
cause we all know Complexity is a precursor to Mr. Murphy
while i won't say its impossible..
i highly doubt a very sizable reef tank is possible...
without either a HUGE investment in a Natural thermodynamic cooling process(and sometimes even this is NOT possible depending on your geographical location and/or seasonal changes IMO)
or a HUGE investment in solar/wind/hydro to compensate for serious electric consumption..
must be nice to be rich if cost is no object to this "green" reef setup..
cause it will cost ALOT.. and would hope to be as Simple as it is "green"..
cause we all know Complexity is a precursor to Mr. Murphy