What is this green stuff?

SeanPep

New member
Was looking from the side of my tank and saw this green stuff in my sand. Can anyone tell me what it is?
 

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With a new tank its "normal" and more than likely will/may go away on its own..
During the "maturing" process of a tank you may get
diatoms/cyano/various colors and shapes of algae,etc..
Most go away with proper maintenance..

Its normal.. Don't do anything yet..
If it really gets bad (blankets the sand/liverock,etc..) then you can try a few things (3 day blackout, cyano chemicals,etc..) but again.. Hold off on anything for now..
 
Syphon it out. Check your nitrate and phosphate levels. If they are high you may need to run GFO to help remove the phosphates. Water changes for nitrates. If you don't have a lot of flow in your tank try increasing the amount of flow.

Another thing to check for is your lighting spectrum if you run LED's. I found when I was running more whites on my LED's I had more cyano. Mine was the red stuff though. Now that I run more blues and reduced my whites, my cyano problem is clearing up. Some people do lights out for 3 days to help clear it up. I found that wasn't really working in my case. Just depends on how severe of cyano problem you have. Your's looks like a light case of cyano from that pic.

That gives you an idea for a few things to check for. I also believe cyano to be part a natural "cycle" on a new setup. Sometimes some things just have to run their course. If everything tests out fine, just keep up on manual removal and eventually you will get the upper hand. Good luck!
 
My belief is that cyano is there for a reason and actually serving a beneficial process.. (some say its what started life on earth.. due to it creating oxygen)
Unless its a real nuisance and overgrowing I let it run its course..
 
My belief is that cyano is there for a reason and actually serving a beneficial process.. (some say its what started life on earth.. due to it creating oxygen)
Unless its a real nuisance and overgrowing I let it run its course..

I agree. I'm cool with seeing a little bit of it as long as it isn't covering my whole sand bed like it was before. I was almost ready to try Red Slime Remover on my tank but decided to hold off because if it kills that bacteria, then I almost think that it kills some other beneficial bacteria too. Not saying that Red Slime Remover doesn't work, but I was still hesitant and decided not to use it. Even after people saying they showed no negative effects after using it. Like I said in my post above, I just changed the settings on my lighting on my LED's and it made a world of difference. So that is definitely a factor people should keep in mind.
 
I had green cyano in my tank fire r months even though I had no detectable nitrates or phosphates. My flow is great, so I decided to use chemi-clean. It cleared the tank up in three days with no harmful side effects. After doing some research on cyano bacteria I decided that the chemical route was the way to go. Glad I did.
 
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