Fire Shrimp MIA

[salty tank]

I went out of town this weekend and came home to no more fire shrimp. I didnt feed my yellow tang, 2 saddle back clowns and blue damsel friday or saturday. Do you think that my fish got hungry and ate him?
Also my skimmer has been acting up, there isnt any foam going into the collection cup, do you think the protein skimmer not workin caused my shrimp to die? I have no idea! Please help

 

[angelsrock]

i dont think so, the fire shrimp could be molting which will make him disappear for a few days

 

[salty tank]

everytime he has molted he is still visible. He has to be dead