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- Dec 4, 2012
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I have recurring cyano. Past 2-3 years. Mostly on the sandbed. Tank is 210 gal that is 10+ years old. I've removed the cyano from the sandbed using a 3/4 inch pvc pipe plumbed to a 1 inch hose. I removed a bunch of sand in the process. Added chemiclean. It goes away only to have it return in 3-4 months. For years now I'm having to dose nitrates. If I don't, nitrates bottoms out. I use Loudwolf sodium nitrate. Dose 70 ml a day to keep nitrates at 5-7 ppm. Phosphates is at 0.04 ppm. 3x Tunze 6105 is used for flow. I've tried hydrogen peroxide, started losing corals from probably overdosing a bit. I feed pellets and nori once a day. I'm about ready to go to fish only. Then I would not need strong lighting. I feel like I did every thing I could. Read all the post on it. Any body have any