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What’s an RDP Refugia/Sump?

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jfinch View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jfinch Quote  Post ReplyReply Direct Link To This Post Posted: January 16 2004 at 10:46pm
So you wouldn't do anything to reduced/eliminate the cyano from the refugia?
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Marcus View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Marcus Quote  Post ReplyReply Direct Link To This Post Posted: January 16 2004 at 10:53pm

If cyano is on the sand, it greatly reduces the denitrifyication of your sand bed.  I would get it out.

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rfoote View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rfoote Quote  Post ReplyReply Direct Link To This Post Posted: January 16 2004 at 10:56pm
Jon - I would personally try to rid the Cyano from my refugia.  Just my opinion though, and from my experience - Cyano is not an algae and the bacteria is of course alive in the main tank.  Also, I've never read(other than maybe conchs) or had great experience with any invert eating Cyano.
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Mark Peterson View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark Peterson Quote  Post ReplyReply Direct Link To This Post Posted: January 16 2004 at 11:14pm
Marcus makes a good point.
To answer Jon's question, I will speak from personal experience. If it gets worse than I can stand, like it's covering everything, then I siphon some of it out and swish it around as well, but I don't do a water change. I hate to bother with a water change when cyano is the way that nature handles an increase of nutients. After all, it's a bacteria and algae combination! It's eating the nutrients before the sand bed can get any. I guess now that I think of it that way, removing it is being kind to my favorite sandbed. So who should I favor? That's a question of personal taste and probably doesn't matter in the long run. As I siphon it out, I know that nutrients are being removed from the system. Hmmmm, one of the four purposes of the refugia!
On the other hand, I've often seen cyano disappear after a few days or weeks as other processes recover/step up to handle the nutrient load.

About two months ago I posted a pic of some bright green cyano growing on some of the back sand in the Bangerter 180. It's been there for about a year and doesn't get any worse. I kind of like the color and I definitely like algae...so it stays and causes no problem!
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