Vitor!! you think like me!!! We use sunlight.
it´hard to use sunlight but is posible. I have algae (a little) because I don´t have skimmer and my water is not RO.
I have an experimental system, smaller than yours, and diferent.
my system consist in a outdoor display and indoor surge device and sump.
the temperatures are fine all the time, even in summer, because my sump works like a regulator (is bigger than the display).
the link of the explanation of my system
http://www.clamsdirect.com/forum/viewtopic.php?t=2131
I have
2 Tridacna maxima
2 Montipora
1 sexy shrimp
live rock
no skimmer
no fish
parameters are fine
new pics 16.00PM
I´m not testing the sunlight (because I know it works), I´m proving if the rainwater is viable in a reef tank.
the next...is Acropora because is more dificult to maintain than Montipora.
Victor, your system is my goal...ok.
I enjoy your reef really.
martin
regards