All my shrimp are gone?

[jason the filter freak]

Except for my pistol shrimp. 

 

I have an IM 30 that's topped off with RO, gets a water change every three weeks, filtration via tunze 9004, intank media rack converted to refugium. 

 

I had a cleaner, 2 sexy shrimp, 2 peppermint, and a glass anem shrimp. Everyone was fine until the hurricane, I lost 1 sexy shrimp after 7 hour outtage. Everything else was fine. Over the last 2 months the 2nd sexy, 2 peppermint, cleaner, and glass anem shrimp are all gone. 

 

Only recent addition is a small royal gramma. 

Residents: high bar goby/.5 peppermint pistol, trip of 3 small ocillaris, green emerald crab, non-anem hosting porcelain crab, 2-3" bta. Misc hermits, snails, fighting conch. All had been in the tank with all the shrimp (save the gramma) for at least 3 months. 

 

Don't get what gives? 

I've never seen a bristle work in the tank, no hydroids, aphasia, etc. 

 

Feeding 3 x a week. Clean the skimmer the same. 

[Origami]

Royal Gramma can be aggressive, even to shrimp. Often you'll see missing antenna, forelegs and such first, though. Do the disappearances coincide with the addition of the RG?

[jason the filter freak]

I don't think so but I failed to pay close attention to the remaining invert members when I dropped the gramma in (its pretty small). The shrimp would disappear into the rock work for periods of time so I wasn't alarmed until I realized the cleaner and peppermints weren't flying out of the rock for mysis which I only feed for approx every 2 weeks. 

[mari.harutunian]

Check all parameters. They’ll be the first to go if anything is wrong.

 

 

Sent from my iPhone using Tapatalk

[jason the filter freak]

I checked the water params, nothing seemed off. There are fringe things I don't have kits for but if it was invert specific chem I would have expected to lose the star fish, hermits, crabs, corals etc. 

[AlanM]

i lost all of my peppermints through the overflows a while ago.  They are resilient at getting through slats or slots.