1 - Are there any signs I should watch for in some of the stony corals that would warrant me turning the lights back one - or will they be OK for three days. 3 days of lights off, they will be fine. 2 - I have an DYI algae scrubber in the Fuge sump - should I clean it and take it offline for the three days, or just leave it in place? I would leave it in place 3 - I have auto dosers for Alk and Cal - should these continue to run as normal, or should I take those offline as well? My thinking is the corals and coralline will grow less during the 3 days with now light, so they may not need it. I doubt leaving it on will make much difference. 4 - When the 3 days are over, should the lighting schedule/intensity go right back to where it was, or should I ease the tank back into the regular schedule and intensity? I would cut back a couple hours for a week or two. 5 - Are they any other things I should keep in minds and watch for during these three days? The tank should be in complete darkness. This means putting a blanket of some sort to block out all light. I have always advised people doing this to change out GFO right before doing this. I also advised to siphon the excess cyano just before starting the lights out method. This is best done at the end of your lighting cycle. You may think you dont have phosphate but cyano cannot thrive without it. The GFO will absorb any residual phoshate released by the dying cyano. I also lig to use a larger dose of GFO only during the lights off period. You can return to normal after. Also Catalina water is high in silicates compared to water coming off a reef. This could also be contributing to your issue. GFO will deal with that as well.