Update to snails Dying

[stang393]

I had 7 snails.
Now there are 2?
Funny cuz i have some many other things in there, why just the snails?
of the 2 left, when I woke up, 1 had fallen off the glass and laying upside down...so I'm thinking thats not a good sign, he's prolly gonna be dead in a day or 2.
I wish i knew what was killing them..
Original Post
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The other day I found one of my turbos in the middle of the tank upside down closed up.
So I poked at him and flipped him over.
He opened up moved around a bit and closed up.
I left him for a day and he was still in the same position the next day.
The next day, I pulled him out, thinking he was dead and as i was moving him he came out again.
I held him near the glass he sort of grabbed on to it, but not enough to hold himself.
After a few attempts I left him on the live rock where he's just moving a little bit.
They Day after, I poked him and he was dead...the smell confirmed it.
They next day Another is laying in the middle upside down..barely moving
HELP!
Any Ideas would be greatly appreciated.
The water Parms are correct, the other 6 Turbos are fine, there is Plenty to eat..
This is a 65 Gal 4 month old tank.
PH is 8.2-8.4
Salinity is 1.022-.024
temp is 80
Nitrite = 0
Phospate = 5.0 (running kents phospahate sponge)
Copper= .05 mg/L Running Coppersorb just in case this was it)
Amoninia = 0 and high has only been .25
Nitrate = between 0 and 40
Tank Currently has:
10 damsels
6 turbos (now 5 and 1 on the way out)
3 Peppermint shrimp
4 small Emerald Crabs
2 small Brittle stars
2 Queen Conch Snails
35lbs of close by LFS Cured LR
Half Deep Coral Bed

 

[bang guy]

I'd guess either Osmotic shock from an improper acclimation or they are starving to death.

 

[stang393]

Originally posted by Bang Guy
I'd guess either Osmotic shock from an improper acclimation or they are starving to death.
Could they be shocked from 2 months ago?
If 1 is left and it lives, them I could think it's not enough food.
But with 1 left and it dies...can't be food?

 

[bang guy]

Originally posted by Stang393
Could they be shocked from 2 months ago?

That's on the outer edge of the time frame IMO. usually after a month they have either recovered or died.
Another option is copper accumulation. I'm still thinking starvation though.
If you have 6 snails and enough food for 4 then all 6 will starve because they get so weak they can't feed before they actually die.
If you add another snail today and it does fine then that was it.

 

[stang393]

Originally posted by Bang Guy
That's on the outer edge of the time frame IMO. usually after a month they have either recovered or died.
Another option is copper accumulation. I'm still thinking starvation though.
If you have 6 snails and enough food for 4 then all 6 will starve because they get so weak they can't feed before they actually die.
If you add another snail today and it does fine then that was it.
Good idea...I got to figure this out before my tank gets to messy.
Thanks for the help.