I currently have 6- 54 watt t5s 3 and 3 and am getting 2 250 watt mh fixture. How long should I leave the mh lights on for without shocking the corals??
do you mean acclimation time or once they are acclimated?
if you are asking about acclimation time then start a few hours a day then work your way up from there.
if you are reffering to after they are acclimated then 8-10hrs a day is good
