Help lossing inverts!!

[Aquatic Impressions]

Ok so can some one please try to explain to me whats going on all my water levels are normal except the Ph is a little off at 8.0 but other then im on point but I have lost two blue legged crabs and now my coral band shrimp any ideas??

 

[James M]

What’s normal levels ?
What other inhabitants do you have ?

 

[Aquatic Impressions]

PH 8.0
NITRITE 0
NITRATE 0
AMMONIA 0
PHOS0.25
CAL 400
1 Davinci clown
2 frogspawn
Multi zoas
5 Nas snails
2 emerld crabs
8 red legged hermits

 

[Aquatic Impressions]

PH 8.0
NITRITE 0
NITRATE 0
AMMONIA 0
PHOS0.25
CAL 400
1 Davinci clown
2 frogspawn
Multi zoas
5 Nas snails
2 emerld crabs

 

[Aquatic Impressions]

What’s normal levels ?
What other inhabitants do you have ?

PH 8.0
NITRITE 0
NITRATE 0
AMMONIA 0
PHOS0.25
CAL 400
1 Davinci clown
2 frogspawn
Multi zoas
5 Nas snails
2 emerld crabs

 

[James M]

Are you using RODI water ?

 

[Aquatic Impressions]

Are you using RODI water ?

Of course

 

[Aquatic Impressions]

Of course

The dead red legged looked like somthing ate half there bodies just the claws were left and now the cbs is dead

 

[peppe_67]

The dead red legged looked like somthing ate half there bodies just the claws were left and now the cbs is dead

I've experienced the same in our tank and I think that it's hermit crabs that are responsible. As I understand it, they are known to be aggresive against others ( mostly in search of new shells)