Any idea what this could be?

[Crass]

Hey everyone

So I noticed this on the back of my bonzai acropora today. Any idea what it could be? Is it just the fragging break point?

Its base is scaly looking

 

[Ron Reefman]

I don't know, but I can call for some help.
#reefsquad

 

[waleedreef]

it looks like green cyano for me and I had it before. it's much easier than pink cyano.

how much phosphate?
how old is the tank?
what is your filtering system?

 

[Leslie Tabor]

Could be a sponge?

 

[Crass]

it looks like green cyano for me and I had it before. it's much easier than pink cyano.

how much phosphate?
how old is the tank?
what is your filtering system?

Phosphates 0.0 on hanna

Tank is 3-4 months old

Running filter floss, carbon, GFO and chaeto in AIO back chamber.

Dont believe its cyanobacteria, to me it looks hard and rock like, maybe where it was snapped off the main piece? Like it looks as if it was fraged sideways or something lol

 

[waleedreef]

Phosphates 0.0 on hanna

Tank is 3-4 months old

Running filter floss, carbon, GFO and chaeto in AIO back chamber.

Dont believe its cyanobacteria, to me it looks hard and rock like, maybe where it was snapped off the main piece? Like it looks as if it was fraged sideways or something lol

why phosphate is 0.00? reduce the media in GFO by half. GFO is used to balance phosphate (0.03 -0,1). phosphate is not used to lower phosphate.

how much nitrate?

please edit photo and make circle on which area you are asking about? if you talking about full picture then as
Leslie Tabor said sponge.

 

[Crass]

why phosphate is 0.00? reduce the media in GFO by half. GFO is used to balance phosphate (0.03 -0,1). phosphate is not used to lower phosphate.

how much nitrate?

please edit photo and make circle on which area you are asking about? if you talking about full picture then as
Leslie Tabor said sponge.

Nitrates are 2-3 range

Will pop out some of the GFO

 

[waleedreef]

what is this in arrow?



and the issue on here or other rocks and sands?

 

[Crass]

what is this in arrow?



and the issue on here or other rocks and sands?

Finally got a good pic!

Just have the issue here

 

[html]

green cyano over deed coral

 

[waleedreef]

green cyano.

 

[Ron Reefman]

If it is green cyano, it should just blow off with a turkey baster. Cyano is a bacteria and I don't think it attaches well to anything.