pinched mantle

[Z06-Hec]

So i moved my clams to my new tank from the smaller one they were in. I tried to be as careful as possible, the wife tried to come help and with her in the way i ended up hitting the rock my derasa was attached to on the side of the tank and she detached from the rock and fell over. I took it off the rock and put it into the bucket for acclimating. after 1.5 hour i put them both into the new tank. my Crocea was still attached to its rock and was perfectly fine throughout the process.
My derasa obviously got stressed with all that, when i put her into the new tank she was definitely gaping. This morning she is not gaping anymore and is open pretty good except now she has some pinched mantle on the edge. most of the mantle is out but this corner is not coming past the shell.
I placed some carbon in my sump. Im hoping she will be ok, she is open nicely except for that spot. My Crocea looks totally fine.

 

[Z06-Hec]

uhm ok... Well anyway

Next day it looked bad so i decided to dip her, 15 mins in RO water, matched temp, basted all around to get a good flow on her. Placed her back in. She stood shut for a few hours then opened a very little bit.

This morning she is dead. :-(
Crocea is doing perfectly well, still attached her original rock from the other tank
phosphate < 0.4
Calcium reads at 570 ( can never be accurate with all this drop counting, going to test again in a bit )
Dkh 9.8
PH 8.27
Salinity from 1.022-1.025 ( i have an instant ocean tester reads 1.025 and i have a coralife deep six reading 1.022)
amonia and nitrite both at 0
nitrate from 20-40 (previous tank they were in read 40-60 when i moved them)

 

[Tahoe61]

I would think if PMD were the issue that the Crocea would have been the first to show signs. A dying clams looks very much like clam with PMD, ruffled edges to the mantle with a shrunken look, withdrawal away from the shell.

The stress of moving, possible damage to the foot or ligaments or muscles from the bump is my guess.

I would however nail down that SG with a refractometer. Those are fairly large swings in SG and nitrates regardless of the time you put into acclimation. The Crocea fared well and it was just too much for the Derasa, it happens.

It's extremely disappointing to lose a clam, I lost a large older Derasa from a reactor muscle injury and I never figured out how the injury occurred.

In the future if you're going to do a FW bath try to match pH as closely as possible.

 

[Z06-Hec]

Thanks for the reply, yeah i am going to look for a refractometer. I have a digital PH pen and i love it. Wish they had a digital solution for all the parameters.
I bought 2 phos reactors, going to daisy chain them one for nitrate and other for phosphate.

 

[SantaMonicaHelp]

Sorry for your loss... guessing the wife will not be so eager to help next time :/

Also, very much agree, wish there was a digital test for all parameters..