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Old 11/08/2019, 03:40 PM   #1
foneman02
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Join Date: Feb 2012
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Dragons breath algae

Is it possible that this macro algae is causing this black looks like diatoms, to grow on my glass. I never get brown or green algae to grow. Also the sand will turns brown within 24 hours of being stirred up. If I donít stir up sand it will start to clump within a couple of days. Tank numbers are phosphate 0.04, nitrate 0. Mag 1250 Alk 8 dkh, cal 460. Temp 78. Lighting Chinese black boxís run blues at 80% whites at 10%.


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Old 11/09/2019, 08:56 AM   #2
Michael Hoaster
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Plants don't cause algae, but they can bring it in to your tank, if coated in it. You can clean new macros with a 20-1 bleach solution to prevent this. Sounds like diatoms on your sand. New tank?


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As many naturalists and environmentalists have suggested, we should set aside our arrogance,
our desire to conquer and control everything, and walk hand in hand with Mother Nature. -Walter Adey

Current Tank Info: 180g Seagrass Sandbar Lagoon, START DATE November 28, 2018
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Old 11/09/2019, 10:48 AM   #3
foneman02
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Tank is 3 years up and running. I do have a sump and Refugium. Lots of small feather duster worms grow there. I occasionally clean it out since detritus seems to collect there a lot. The worms love it. I run GFO to lower phosphate and dose nopox daily. Just want to find source of this black algae . Coralline is present on some rock but not flourishing like I would like to.


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Old 11/09/2019, 11:07 AM   #4
Michael Hoaster
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Black stuff might be cyanobacteria. For that, I'd recommend a week or two of aggressive daily manual removal, followed by chemiclean treatment (or erythromycin), a 3-4 day blackout (wrap the tank), manual removal of any remaining, and finally, a large water change.

Doing just one thing doesn't usually work. I have found that cyano (and dinos) need to be weakened before delivering the knockout blow. That's what worked for me.


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As many naturalists and environmentalists have suggested, we should set aside our arrogance,
our desire to conquer and control everything, and walk hand in hand with Mother Nature. -Walter Adey

Current Tank Info: 180g Seagrass Sandbar Lagoon, START DATE November 28, 2018
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