Cyanobacteria: how to fix it.

Is this cyano? The reddish coloring makes me leap to that conclusion, however I'm still very very new. It's got long 'strings' that move around in the flow.
 

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when I used GFO and biopellets, my nitrates and phospates were nonexistent. However, I recently removed the biopellets (they smelled horrible!) and just went with the GFO and I'm seeing a small cyano problem. Direct sun can't get to my tank in the basement and I run LED's. I do feed quite a bit though. I have some more biobellets on order and hopefully I can get my tank cleared again.

I also run a uv sterilizer. for some reason I thought this was supposed to help with that.
 
Im pretty sure Ive started a cycle of the cyano as well but I have a 14 day old tank. Think I should just let it cycle on through? I have nothing live in the tank, just the Araga-Alive sand and Base Rock. I posted in another section with tank info and pics here.
 
have you tried an upflow algae skimmer? thats what i use and my tank is right in front of a window and no algae in the tank!
 
question

question

my tank is aprox 60 days old now and im seeing cyno on the sand bed. i vacumed several times ..my mg was high so i did a water change and the cyno keeps coming back on my sand bed.

i also have what i assume is a diatom bloom going on.i have minimal flow on the substrate due to dusters and delicate stuff that would get blown away with added current.i never had a cycle period per-say due to the rock being cured already.

i have a kole tang,psudeochromus (spelling) 2 perc clown for fish.a small assortment of snails and bluelegs a serpent star thats aprox 18 inches across..hes huge

i also have some assorted soft corals,hammer,kenya trees,mushrooms,candycane pulsing zena,star polyps and a bubble tip

75 gallon drilled overflow
t5 lights,2 months old
skimmer rated 110 gallon tank
10 gallon sump
10 gallon fuge full of micro alge and pods

1400mg
470ca
9.8kh
phosphate=undetectable
nitrate=undetectable
nitrite=undetectable

now im not sure whats causing the cyno,no sunlight hitting the tank.
my question is if i do the lights out process for 3 days is there a chance of hurting any of my livestock?

the cyno is not real bad but i dont want it to get out of hand.
 
FWIW; I have a 180 which i started cycling in March of this year with NO lights, added sandbed a few weeks into the cycle still with NO lights, added some dryrock and did some of my aquascaping during the cycle still with NO lights. In June I added 1 AI hydra LED fixture over the center of the tank, since it is a new tank with no corals it didn't really need to be lit completely. In the mean time I found some old fluorescent 18" fixtures and went to PETCO and picked up a 10k 18" daylight bulb to use in the meantime until i order my other LED's.
Directly below the cheap fluorescent on one small rock is a cyano outbreak, directly below the AI Hydras is beautiful clean white sand and rocks. On Sunday i switched the fluorescent to the opposite side to see if it dies on one side and starts growing on the other.
 
I followed this method this past weekend. The tank looks good, the corals are all out and happy again, however, I have not seen my yellow watchman goby or my royal gramma since I've had the lights back on. Been on for about 8 hours now. My other fish all seem back to normal, the banggai, the ocelaris and the 6 line are all back to business as usual. Is it common for some fish to stay hidden for so long after keeping the lights out for a few days?
 
I'm gonna have to try lights out for a day or two. I saw it pop up in my fuge before and it would go away by turning that light off for a day or two. I had an outbreak in my display, I've add phosguard and a bag of purigen in a reactor. Its going away but I've been hesitant to do lights out since I have several new frags.
 
Coral RX! I mounted some frags today on a piece of rubble that had a patch of cyano on it. After soaking in the Coral RX, a quick RODI water dip, and back into the tank the cyano quickly went from dark red/maroon to a bright red-orange and disintegrated.
 
I've been battling cyano (mainly on the sand) for over a year now in my 150 gal mixed reef. And in that time I've tried everything: lights out, all new bulbs, replaced everything in my RODI to get the TDS back down to 0, increased flow, cut my feedings down to nothing, sucked all the cyano out. I tried Chemiclean a few times and that didn't even put a dent in it. But I know it's cyano because it's not there when my lights first come on and gradually gets worse once they do. And it actually now looks like my cyano problem is getting worse!!!

So basically, I'm now ready to start experimenting with unorthodox treatments. One thing that has always been in the back of my mind is cranking the mag up to over 1500. Has anyone ever done this with any success? My mag stays at around 1350; but in my old tank (which this tank was upgraded from) it was always over 1500 because of the salt I used. I never had any cyano problems in the old tank. So I'm wondering if there might be a correlation. Thoughts? Suggestions?
 
I did two days lights out removed my chemipure elite threw it away, and on the last day I siphoned out the Cyanobacteria brushed my rocks and skimmed wet. Third day turned lights back on havnt seen it since. I learned of this procedure from RC, after many weeks of failing to get it to stop popping up.
 
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