bleaching.. acro Help

[Pcrain]

all this bleaching happened in 3 days and only to the acros I have no idea what could cause this extreme bleaching Help

Tank specs
90g SPS/softies/ LPS
20 sump
undect nitrates
undect phos
8.2 PH
460 CAL
9 KH

 

[pisces4u]

Looks more like RTN than bleaching.

Sometimes iodine dips can help. Frag off healthy branches if you can't remove the whole colony to dip it.

 

[Pcrain]

I dont know if an iodine dip would help i Believe this is being cause by vodka dosing and not feeding enough t o keep up with the bacteria but it is such speedy bleaching I am not sure if it could be just one thing so far i have been feeding more i threw some ammino acids & pyto maybe i can stop it??

 

[saltygeek]

Like pisces4u said, doesnt look like bleaching. Looks like the flesh is coming off, RTN.

 

[Pcrain]

what would cause that i haven't added anything to the tank in 6 months i fragged one of the corals up and the other i just dipped

 

[Pcrain]

what would cause that i haven't added anything to the tank in 6 months

 

[psteeleb]

what would cause that i haven't added anything to the tank in 6 months

check you parameters - maybe your alk dropped so far the coral got stressed and now is rtning.

I really guessing not knowing parameters but if you haven't added anything it's probably a build up or depleation of something

most likely suspects are low alk or high phosphates
but could be almost anything.

 

[Pcrain]

all my pram's are great... i am curious to what could have stressed the coral enough for it to have RTN is there any way to truly prevent RTN from happening ?

 

[psteeleb]

all my pram's are great... i am curious to what could have stressed the coral enough for it to have RTN is there any way to truly prevent RTN from happening ?

it can be a lot of things - I had one rtn when my wife dosed phyto, she poured some in right over a very healthy microcladus and it rtned over night other corals next to it were totally unaffected. at least that's the only thing we could come up with as the coral was perfectly healthy colorful , great PE and growing great and then poof

I've lost a few to rtn but most have been maricultured mini colonies I picked up and did fine for a couple months then just gave up (some stned some rtned)