sps are turning brown from the tips , please help

[DeepReef]

Just wondering if anyone can help me on what’s causing my coral burning tips.
I have some lps and all doing fine but some of my acros getting stripped from the top .
I have just did some test
Kh 8
Cal 380
Mg 1290
Nitrates between 10-25
Po4 Hanna phosphorus 32 , which is 0.09 when converting to phosphate.
potassium 380.

Really disparate to get to the bottom of the issue , ati icp sent out last week , unfortunately takes at least couple weeks to get the results back.

 

[TX_Punisher]

Had any alk swings lately? It looks like there may be algae growing on the dead tips in one of your photos.

changed lighting lately?

 

[Uncle99]

What I see is algae on the tips.
Do you have any visible signs of algae or Cyano.
Any changes in lighting intensity, spectrum or photoperiod?

 

[ScottB]

Nutrients are OK. Ca could be higher but not the problem.

How old is the biome? Start with dead rock or live?

 

[DeepReef]

Had any alk swings lately? It looks like there may be algae growing on the dead tips in one of your photos.

changed lighting lately?

Alk has been between 1.024 and 1.025 , haven’t changed Light schedule since day one.

 

[Uncle99]

Alk has been between 1.024 and 1.025 , haven’t changed Light schedule since day one.

That’s a salinity number....

 

[DeepReef]

What I see is algae on the tips.
Do you have any visible signs of algae or Cyano.
Any changes in lighting intensity, spectrum or photoperiod?

Had abit of cyano on couple of LR, removed it using turkey baster.
I have ati hybrid with 6t5s, the light running for 12 hrs , %50 leds and %100 for the t5s .

 

[Uncle99]

Had abit of cyano on couple of LR, removed it using turkey baster.
I have ati hybrid with 6t5s, the light running for 12 hrs , %50 leds and %100 for the t5s .

Are you sure that the tips are burnt, and not, new skeleton.
Tips should stay clean or it’s not going to fill.

 

[DeepReef]

That’s a salinity number....

My bad , got confused . Kh is been between 7.7 and 8 .

 

[vetteguy53081]

Blow the tips with a turkey baster to assure its not simple diatoms. Additionally, your parameters may need a simple tweeking. What test kits are you using?
Moderate lighting.

Kh 8 - Should be 8010. Not too bad
Cal 380 - bring to 440
Mg 1290 range 1300-1340. Ok where it is
Nitrates between 10-25 - 10 should be adequate
Po4 Hanna phosphorus 32 , which is 0.09 when converting to phosphate. _PO4 < .04

 

[DeepReef]

Blow the tips with a turkey baster to assure its not simple diatoms. Additionally, your parameters may need a simple tweeking. What test kits are you using?
Moderate lighting.

Kh 8 - Should be 8010. Not too bad
Cal 380 - bring to 440
Mg 1290 range 1300-1340. Ok where it is
Nitrates between 10-25 - 10 should be adequate
Po4 Hanna phosphorus 32 , which is 0.09 when converting to phosphate. _PO4 < .04

 

[DeepReef]

Tank is been running for 7 months without any issues until the last couple of weeks, and all the sudden some of sps colonies start to strip for the tips.
I use salifert for(KH,CAL,MAG).

 

[vetteguy53081]

Tank is been running for 7 months without any issues until the last couple of weeks, and all the sudden some of sps colonies start to strip for the tips.
I use salifert for(KH,CAL,MAG).

ANY changes in flow, lighting, type of salt, tank temperature?

 

[DeepReef]

Absolutely nothing changed, same flow and same light intensity.
Not water change for a while .
What chance do I have to save the corals ?will they recover?

 

[vetteguy53081]

Absolutely nothing changed, same flow and same light intensity.
Not water change for a while .
What chance do I have to save the corals ?will they recover?

Did you try gentle bursts with turkey baster ? It may be simple diatom covering new growth.

 

[Operator Wrasse]

I think you could try one of three things... it looks like the flesh is receding or not growing fast enough to match the growth of the skeleton. The flesh grows from the uptake of nutrients (NO3 and PO4) via food. Algae grows on skeleton that does not have flesh.

1) KZ Flatworm Stop works by growing SPS flesh back faster than flatworms can eat. BRS recommends using even after flatworms are defeated because of its effectiveness on their tanks.
2) Feed more planktonic foods... phyto, reef roids, etc. More nutrient uptake = more opportunity for growth
3) You could begin a carbon dosing regiment. Anaerobic bacteria with uptake the NO3 and PO4, making it available for uptake by your acros. I don't personally recommend this unless you are willing to pay close attention to your NO3 and PO4 as you begin dosing, plus your numbers already seem stable.

I'm not an expert, simply someone who loves learning about reef tanks. If any of this information seems incorrect, I would love to know from someone with more knowledge than I.