1 unhappy Maxima.. why?

[m0nkie]

I can't figure it out. I have 3 Maximas.. 1 is always unhappy.

Ammonia, Nitrite: 0
Nitrate: ~5
Temp: 80-82
Salinity: 1.025
Alkalinity: 9
Calcium: 450
Mag: 1350

4 Kessil LED. two 360WE at 90%, two 150 actinic

2 blue maximas are fully expanded since purchase. The 6" one is sitting on the sandbed. A small rock under it, but not attached. It looks happy so I'm going to leave it. smaller 2" blue is attached to a clam shell on a rock. sitting at ~2/3 down the tank.

the gold maxima never attaches. Got it a month ago along with the small blue one (different seller). It was gaping for a few days, moved it from sandbed next to blue one. it recovered and opened fully. this morning (2 weeks later), started gaping again, and now not expanding. First time seeing it this shriveled up. yesterday it was fully expanded just like the blue one..

-no pyramid snails, I check every week with red flashlight on all clams
-mantle not pinched. Looks perfectly spread, just not expanded.
-new Foxface Lo. loves nori, never touched the clams or corals (yet)
-my sexy shrimp sometimes jump on the gold clam, but never stays that long
-has a small nice white ring of shell growth.
-tank is in my room, so I've been looking the whole day.. never opened once

shall I pull it out for a FW dip? Or how long should I wait?

pictures of other clams for references

 

[moliken]

i'd say a proper fwd is needed NOW. phosphates??

 

[m0nkie]

Pho was at 0.03

Ill dip him today. Match alk, temp and ph right?

 

[m0nkie]

well it's not looking good. Got off work and immediately FW dipped it.

where the foot use to be, it's empty now. Clam doesn't close fully either. pretty sure it's gone. Just not sure what the reason was.

lot of amphipods came out of the clam during the dip. Can they be the problem?

I think the big one is a amphipod too? big antennas. all the small particles are pods. this is during the dip

it was like this for the past month.. do clams just die like this in 2-3 days?

 

[moliken]

clams can go in 24 hrs from great to dead. yes.

 

[Sangheili]

Had this happen to me recently too with a 6" maxima.

 

[m0nkie]

Had this happen to me recently too with a 6" maxima.

good luck! mine was gone the next day. the other 2 maximas are doing well still.. I think it could be my acclimation process + shipping stress. I got the 2 healthy ones from a local reefer

 

[hedgedrew]

I'm of beleif too muvh blue light not enough bright white. In nature they are very shallow. Maybe 1 to 5 feet. Sometimes less. They get bright daylight par all day. Not all the blue we throw at them at bottom of tank from kessels.

 

[hedgedrew]

I've killed clams like this with 400 watt radiums and the same clam at same time do great in the whiter ushio 14k bulb.

 

[m0nkie]

interesting. thanks. will ramp white to 90% slowly and give it a try

 

[Stevenliu9]

So sorry to see that, I have rapid clam death experience too. Often time they might have already come with certain dispositions no one could have known such as sponge or algal infection within the shell. And sadly nothing can cure it, not even fwd. the amphipod you see coming out of the clam could be decomposers already getting situated to "feast" on the clam.