is this cyno help needed.

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Hi guys this keeps coming back after 2 days when i have siphoned the subsstate and my rocks are full of it, it comes off easily is it cyno or something else. Driving me nuts now.any advice
Pars are
Alk 9.8
Cal 410
Mag 1290 arms slowly raising.
No3 0
Phos 0.1
Temp 26

20151003_112747.jpg
 
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It looks to be cyano, maybe @mariusmeyer can help you here. He battled this some time back.
It could possibly also be dinoflagellates. do some reading on the subject.
Hopefully someone else here can give a more positive ID
 
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Definitly looks like cyano. Dinoflaggelates are brown and forms strings when it gets longer. I have never had cyano grow long strings, always a solid mat. It will grow on the substrate after syphoning as you are desturbing the sand and getting some detritus to the surface. if you take a tukey baster or a power head and direct it onto the rocks, you will see a lot of detritus being blown into the water column. But the cyano should then take some time before popping up again on the rocks. Substate is a bit ,pre difficult and you will have to vacuum it often to get the detritus out.

What worked for me is to syphon into the sump and add some filter wool or filtersocks ( I actually did both) to catch as much as possible. When you vacuum during a waterchange you have limited time. With you syphoning into the sump you can carry on for much longer to make the most out of your effort.
 
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is your ph stable ? does your sump have lights on it? and whats your clean up crew consist of
 
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Ph stable 8.6 and just put cheato in sump no light yet.CUC is hermits cleaner shrimp. Bristle stars and worms in aragonite .
Thanks guys i used a turkey baster and blasted rocks will again vacuum aragonite . Rocks cleaned up but now need to stop it from happening again. Also what causes it.
 
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More flow will prevent detritus from settling but it is not always possible due to coral placement and type of corals. Best is to just make the blowing off of the rocks and vacuuming of the sand part of your maintenance routine.
 
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Thanks guys I got 2 tunz 6105 running in tank as well as well as 2 jebao wp25 but as u say corals get blown all over .
 
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@butcherman after blasting with turkey baster came back again after 2 days gonna blast again tonight and vacuum sand bed again.
 
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