Heat = Total Bleaching or RTN?

[mattj206]

It was Hot today

Tank Probably Hit 82-83

Everything Looks Perfect But One Frag Is Completely White

Wierd Thing Is I Have Another Of the Same Frag That Sits One

Inch Away And Looks Normal

Weird

Did the Heat get it?

Probably....

 

[Montanarocknreefer]

yeah probably stressed that one... Maybe a little difference in water current hard to tell.

 

[mojoreef]

Matt any kind of major stress like that can put the hurt on a coral. It might have een the heat, but usually a series of events.

Mike

 

[Illusion]

Man my tank normally runs from 80-83.. I try not to let it go higher than 83 or lower than 80... I havent really had any problems because of the heat... I would have to Agree with Mojo usually its a series of events...

James

 

[NaH2O]

Did you notice anything else with the coral (i.e. had the tips been bleaching, or was it all at once - white)? Had it been looking healthy prior, and were there any other big swings with the system?

 

[mojoreef]

James you can still get it at 83 even 82 to be honest. Its not so much that 82 or 83 are bad it how quickly did it get thier. and where was the temp when it started to raise. As with pretty much everythting to do with our reef tanks you dont want any large swings f the parameters.


Mike

 

[kevinpo]

How long did you own the coral?
At certain times of the year my tank will swing from 76F-82F in a day. 85F has been the temp. where I began to see some RTN. I've never lost a colony to it but have been pretty scared. IMO the optimum temp. for a Indio-Pacific setup is 78F-82F.

Glad you had another coral of the same type.

Regards,
Kevin

 

[mattj206]

This Bleaching or RTN ( looks more like RTN ) was weird.

The frags are 1 inch appart in the same conditions.

Polyps Always Out-Always Looks Great.

One Died Rapidly Yesterday One Looks Fine.

This Is Wierd - They Have Been There For Several Weeks.

No Known Changes Accept The Hot Temp.

It Happened To Be The Hottest Day When It Quickly Wasted Away

I'm scared of the summer heat. I can't stand to loose my hard to

find SPS.

I'm Thinking Chiller?

 

[kevinpo]

I cut and mount about 140 or so frags a month and have experienced the same thing sometimes so it's not that unusual. Sometimes a frag will just lose some tissue at the base, other times at the tip, and occasionally the whole thing will RTN. I've also had a few colonies (table types) RTN a strip through them. I think sometimes they just die without something being wrong with your overall tank conditions.

On a well established tank I just check:

Temperature
Alkalinity
Calcium
Magnesium
Flow

If I notice a trend on a certain type of coral I will move it to a different location with different lighting/flow.

HTH,
Kevin