Just curious what your preferred setting are. I have a 40 gallon breeder with fish and soft corals. i just bought the Nero 3, playing around with setting..do you use Constant Speed, Pulse, Random split up over 24 hours..do you use the Pulse only for 24hrs, let me know what your combo is. I currently have Random from 9am to 6pm(75%), Pulse(80%) from 6pm to 12am and Constant(50%) from 12am to 9am.