Cyano and flow

[mavv]

Reposting from the Algae forum since it might be more of a newbie question.

Hi all. This is my 10 gallon reef tank.

Livestock is only corals and CUC, no fish.

After going fishless (untimely brook death of two ocellaris), my nutrients bottomed and I got dinos. I "beat" them by doing a 5 day blackout, after which I started sprinkling crushed marine flakes everyday to try to keep my nutrients up.

I know that you don't really beat dinos permanently, so I kept adding food to prevent them from coming back. All my corals seemed to appreciate the broadcast feed, and all showed signs of growing.

My current problem is cyano. It started showing up in the sand bed, not too bad but noticeable enough that I feel it can become a problem.

I have tried spot treating peroxide on the sand bed; that fixed a spot for a couple of days but doesn't really fixes the problem.

After that, I have tried altering my flow, but all that did was annoy the digitata on top.

My flow consists of a jebao ow-10 (left), set at speed 2 and mode w2 (wave). I also have an aquaclear 50 (right) set at max output.

What would you suggest for the jebao placement and setting? I know that high nutrients are contributing to the cyano but as far as I understand cyano is a nuisance, as opposed to the active danger of dinos. I'm afraid of getting dinos again.

Are cyanos something that I can fix with proper flow? This is my first tank, and I hadn't moved the powerhead since set up until I got the cyano.

Thanks.

 

[blaxsun]

Where's the cyano?

 

[mavv]

Where's the cyano?

Sand bed, front of the tank. You can't see much in the picture, but it starts growing out of the sand.

 

[Mr. Mojo Rising]

More flow might possibly help. The way you have your power head set, I imagine there is very little flow down by the sand bed.

What are your nitrate and phosphate levels?

 

[mavv]

More flow might possibly help. The way you have your power head set, I imagine there is very little flow down by the sand bed.

What are your nitrate and phosphate levels?

I have the API tests, which I know are not the most acurate. Nitrate I'd say 5 if I keep up with the daily feeding, phosphate is a shade over 0 but not quite .25, maybe .1

Where would you point the powerhead to maximize flow together with the HOB outlet?

 

[blaxsun]

Sand bed, front of the tank. You can't see much in the picture, but it starts growing out of the sand.

I honestly can't see anything in the picture. If you mean along the glass under the sand, that's pretty standard.

 

[mavv]

I honestly can't see anything in the picture. If you mean along the glass under the sand, that's pretty standard.

These are from this morning. It's not gotten to a full-blown problem yet but I see new strands every day (I'm manually removing and stirring sand every day).