08-20-2007, 04:51 PM
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Cyano is actually more of a bacteria than an algae. We do all call it algae as it seems so much like it. Cyano is more of a product of waste degradation and not photosynthesis, hence the red and not green color. Red plants need seriously bright light to thrive, cyano needs rotting material to cover and propogate on while it eats away at it. You've got the standard salt water woes my friend, we all go through this from time to time. I'd think about cutting back on the feedings or do more and larger water changes/and or get a quality skimmer to remove the excess nutrients. That being said, you can still have issues with cyano due to stagnant water. For a 55g I'd plan on getting to Koralia 2 or 3's, or possibly Seio M620's. I used to preach the Seios until Hydor perfected the Koralia line. Now for $10 more you get a much better unit from Koralia. The extra water movement will prevent slow water areas that Cyano thrives in. Don't worry to much as even experienced reefers have trouble with it. I was good for over a year until my corals grew so large as to block the path from my streams, this allowed cyano to take hold in areas behind my corals.
Clean water such as that from skimming, phosphate reactors, and water changes + high flowing powerheads like Tunze Streams, Hydor Koralia, and Seio units will help to clear up the problem.