New set up with cyano

[annette34429]

I just set up (1 wk ago) a DSB in a 56g with a 30g sump/refugium. New sand in both tanks, topped with LS and LR curing in main tank and sump drain (about 80lbs). NH3 is high as expected. Q: Should I be getting cyano so quickly? Started about 3 days after set up and is now growing pretty well. I don't wan't to introduce snails into NH3 water and have been advised to do no water changes during initial cycling. Should I just wait it out and perhaps just manually clean the glass daily? Should I go ahead and do a waterchange? Doesn't appear to be growing in the refugium yet.

 

[annette34429]

PS
Am also getting areas of black forming about 2-3" below surface of sand. Is this normal so soon.

More info:
Supposedly "fully" cured LR arrived prior to sump being ready and other timing snafus with LFS. Had rock in rubbermaid tub for a few days, then in tank for a few days (with new water), then removed it to place DSB and then back into tank. All holding of LR was done with appropriate water and temp and circulation.

 

[moggyhill]

sounds about right to me. Things are going as expected. Did your live rock still stink when you put it in the tank? Do you have a protein skimmer for it? What are your tank parameters please?