I actually tried to grow that algae for a tang and to not get dinos. So when I stopped dosing nitrate and Phos, it went away on its own. The reason I say they are not truly 0 is cos I have a refugium with chaeto and it is growing well. I also have zoas that are growing really well. So I dont think it is true 0. It just dont show up on tests. Even when I was dosing, it rarely showed up on test kits. I used both Hanna and redsea. Only battle with algae is CUC and manual removal. This time I didnt even do that. CUC took care of it.
I have 2 kessil A360x for lighting. I increased the photo period since I got the torch by an hour to 7 hours. with 2 hour ramp up and 2 hour ramp down. Color specs, I think 0 green or red, there is 70 UV, and rest is all mostly blue. I have a PAR meter so I usually dial in based on the coral req and acclimate them over 2 to 4 weeks.