I'm no expert at reefing, only been into it for a year and my tank that had the extreme cyano is only a month old and I attributed the outbreak to the nitrate spike that naturally comes with the cycling process.
having said that, I just directed the flow so that there were no deadspots in the aquarium at all.
Having good interaction of gases at the surface is important, but unless your tank is enclosed or you have a serious canopy it should be fine without a powerhead creating turbulence at surface.
The key for me was to remove the nitrates and I did that by siphoning the surface of my substrate (this was tricky to do without disrupting the entire bed) and the surface of all of my liverock.
This combined with replacing the water that was siphoned out with fresh ro/di saltwater and adjusting the flow so there were no dead spots to enable detritus (nitrate) buildup has so far aleviated my 72 gallon display of cyano with no chemicals and I had it BAD, so bad that when it first hit I thought of giving up the new tank.
glad i didn't as with a little patience and elbow grease it was an easy fix.
Last edited by Whatigot; 04-08-2008 at 06:41 PM.
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