Hey guys, new to the forums and also new to reefs. I have a couple of questions. I converted my 40b to saltwater almost 7 weeks ago. I started the tank with about 30lbs of cured live rock, and 40lbs carib sea live sand. I am running a bio wheel with active carbon, HOB Odyssea ps75 skimmer, a 700gph and 200 gph power head and 2 tao tronics 165w dimmable units. I cycled the tank with no fish and it took about 24 days to get my params to 0 amm, 0 nitrite, and 20 nitrate. I had a diatom bloom during that time that went away. As of today my params are 0 amm, 0 nitrite, 5 nitrate, 0 phos,. My question is I came home today after working out of town yesterday and I had a light dusting of diatoms on the sand bed and a few on the powerheads as well as a small patch on the inside of the skimmer body. My wife did forget to turn the lights on yesterday so the tank did not have lights on since 9PM on Sunday. I turned them back on about 1PM today, Tuesday. Any thoughts?



