Some acros have white tip, I think growth?

[Fishfinder]

Polyps?

 

[Fishfinder]

Look at those tips at night after lights are out. See if there are polyps in those tips

 

[Zeal]

Look at those tips at night after lights are out. See if there are polyps in those tips

I wanna say yes.... I think.....

 

[Zeal]

Look at those tips at night after lights are out. See if there are polyps in those tips

This was last week

 

[BYU]

looks like new growth to me
you nutrients are not bad at all
just wait and see don’t cut it

 

[Zeal]

looks like new growth to me
you nutrients are not bad at all
just wait and see don’t cut it

It’s been about 2 weeks. I’ve seen this change after dosing AB+

 

[Fishfinder]

It’s been about 2 weeks. I’ve seen this change after dosing AB+

your nutrients are high enough that I don’t think you need that. But if those ares have polyps then it’s fine

 

[Zeal]

looks like new growth to me
you nutrients are not bad at all
just wait and see don’t cut it

See your tips look much nicer then mine. Mine are almost brownish.....

 

[schuby]

Are you measuring phosphate with Hanna phosphorous checker? The one that reads in ppb? What is the ppb value from the meter?

Your alk at 9.5 is not super high, but it is high. If your phosphate is normally 0.03ppm, then that is quite low. High alk + low phosphate = burnt tips on SPS (due to skeleton growing faster than skin/tissue).

 

[Zeal]

Are you measuring phosphate with Hanna phosphorous checker? The one that reads in ppb? What is the ppb value from the meter?

Your alk at 9.5 is not super high, but it is high. If your phosphate is normally 0.03ppm, then that is quite low. High alk + low phosphate = burnt tips on SPS (due to skeleton growing faster than skin/tissue).

Yeah I'm measuring with phosphorus then convert to phosphate.... so.. I need to up to phosphate? I find it strange its only the PC Rainbow

 

[Saltyreef]

I hope im wrong but there seems to be flesh coming off from the sides of the tips. Not white growth at the tips themselves.
This screams STN to me.

 

[Brian_68]

I hope im wrong but there seems to be flesh coming off from the sides of the tips. Not white growth at the tips themselves.
This screams STN to me.

Agree something does not look right my pc rainbow growth is just a lighter shade never white.

 

[Zeal]

I hope im wrong but there seems to be flesh coming off from the sides of the tips. Not white growth at the tips themselves.
This screams STN to me.

That's mesenterial filaments I believe

 

[sunnysidecorals]

Unless the white is moving down I would wait. My bet is new growth.

Pic of my PC rainbow and TGC Starfire (not sure if it’s same/similar to RR) New growth (white tips) is more pronounced in some areas. Pretty standard.

 

[sunnysidecorals]

Whiter light

 

[Zeal]

Whiter light

now you have me wondering...

 

[schuby]

New growth, as in @BYU 's pics, is uniform and the whole end is extending. In your first pic, you can see the sides are inset, non-uniform, and white where the tissue has peeled off. Peeled sections will next turn brown as algae starts to grow. The coral can reclaim the bare skeleton if it starts growing again.

Why the PC Rainbow? Nobody knows. IME, it rarely stays with just one.

Yes, I think you should not have such low values of phosphate. The way to raise it is to not remove so much. What do you do to remove phosphate in your tank? GFO, carbon-dosing, lanthanum chloride, macro-algae, ATS, ...

 

[Zeal]

Whiter light

Can I get a upclose pic

 

[Fishfinder]

His PO4 is .1, not even close to low

 

[Zeal]

His PO4 is .1, not even close to low

Up until today it wasn't that high.

10/20 0.067
10/18 0.009
10/12 0.031
10/8 0.037
9/30 0.003