I switched from a 5 x39W T5 setup to a 2x250W w/ 2x39W T5 today. A fellow reefer gave me a great suggestion on how to acclimate my corals to the new lights.
I have the hood a bit high over the tank, and i've also placed a dozen layers of window screening over the tank. the light will run for 4 hours a day for the 1st week. Everday one more layer of screening will be removed until none is left. Then the light will come down a half inch a day intil it's only 8 inches above the tank.
I have the hood a bit high over the tank, and i've also placed a dozen layers of window screening over the tank. the light will run for 4 hours a day for the 1st week. Everday one more layer of screening will be removed until none is left. Then the light will come down a half inch a day intil it's only 8 inches above the tank.