RTN or Bleaching?

[josh515025]

Is this frag bleaching at the top or having necrosis? My Chalice melted over the course of a week or two about to pull it out. Tank is softies/LpS all other corals look fine only this one is getting white near the top.

Problem is I can’t tell if the problem is too much light or not enough feeding or something else? Any advice would be great.

 

[Saltyreef]

Please post your tanks known parameters and we can help you from there.
Your tank looks relatively new.

 

[josh515025]

Tank has been running for 6 months,

Alk is 9.0 with Hanna
Undetectable Phosphates and Nitrates with Salifert/API test kit and Calcium at 420 API.
Ph 7.8 Hanna checker
Temp stable with inkbird at 78-79 degrees
Salinity at 1.026 Hanna checker

 

[Kingston]

Have th same questions RTN or bleaching... I have a few beginner Acros and started noticing these changes with these birds nests.

Alk 8.5
Ca 424
Mg 1350
Ph 8.3
Po4 0.04
No3 5-10
Temp 77-78

 

[Oso687]

My chalice fell a few times I don’t have it glued yet I just noticed the tips look a little bleached thinking maybe from falling and the favia is looking a little crusty

 

[Oso687]

My chalice fell a few times I don’t have it glued yet I just noticed the tips look a little bleached thinking maybe from falling and the favia is looking a little crusty

Ph 8.55
Alkalinity 9.9
Calcium 440
Phosphate .07

 

[Rp8]

Is this frag bleaching at the top or having necrosis? My Chalice melted over the course of a week or two about to pull it out. Tank is softies/LpS all other corals look fine only this one is getting white near the top.

Problem is I can’t tell if the problem is too much light or not enough feeding or something else? Any advice would be great.

if it is fairly new with undetectable PO4 and NO3, then most likely that is the issue. Feed more or dose to get levels up. then you could also rent a par meter to check your light levels. if there isn't one local for you BRS will rent and ship it, then you send it back.

 

[Rp8]

Ph 8.55
Alkalinity 9.9
Calcium 440
Phosphate .07

your levels look fine, maybe a lighting issue?

 

[Rp8]

Have th same questions RTN or bleaching... I have a few beginner Acros and started noticing these changes with these birds nests.

Alk 8.5
Ca 424
Mg 1350
Ph 8.3
Po4 0.04
No3 5-10
Temp 77-78

Maybe a lighting issue, params look good. or trace elements?

 

[Kingston]

my tank is 96 x 30 x 30 and I am using 2 x 48" Aquatic life T5 hybrids and 4 kessil A360X.