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It's been 2 weeks (the picture is less dramatic because I cleaned the sand bed yesterday). I have now started a 3 day black out period.Looks like the start of diatoms. Blow loose with a turkey baster and net the loose matter and then reduce white light intensity. See if it returns in the morning when lights are on a few hours. Then post another pic
Then it's just diatoms which will go away on their own in the course of several weeks.New tank (1m). Rock is definitely white, though under white light some green algae coloration can be seen on it.
Algae does not disappear at night. Easy to blow off, though a little sticky to rock. Forms strings.
This serves no purpose now. You already started this part of your ugly phase. It is prudent to leave lights off the first 4 months before adding coral and light to allow your tank to develop biodiversity. This makes the ugly stages more manageable in the months after.It's been 2 weeks (the picture is less dramatic because I cleaned the sand bed yesterday). I have now started a 3 day black out period.
No need for blackout. Spme accept it while others dont like the appearance. Diatoms are a brown algae that typically appear in a reef tank that has just completed its cycle but they can also appear in an established reef tank. They can cover sand, rock, pumps, glass, you name it. Diatoms look ugly but in most cases they are harmless so the key is to not panic when they appear.It's been 2 weeks (the picture is less dramatic because I cleaned the sand bed yesterday). I have now started a 3 day black out period.