4. Power & Programming
If you don’t have an Apex, you will want to attach the DC power supply to a wall timer and plug it in. Then simply set your classic timer to power the light on and off based on your tank's nutrient export needs.
If you do have an Apex, open your Fusion program and select the tasks icon. Then, scroll down and select the GRO tab and plug your light into the energy bar or 1Link 24v outlet. Then, select the outlet you used, rename it to refugium light, and set your schedule. We recommend running your refugium lights opposite your display light schedule. You will then reduce or increase the exact length of ON-time based on your tank's nutrient export needs. More light = more nutrient reduction and vice versa. Testing nitrates weekly should give you an idea of how effective your refugium is; when Chaetomorpha or macroalgae is healthy and growing, the more light you give it, the more nutrients it should absorb.