Pinecone-
I'm worried you may have the wrong type of Pepp Shrimp. I had hundreds of Aiptasia in a 240 and 3 shrimp cleaned them up in days. If you have a dozen, they are either really, really small - or they are the wrong type. In a 37 gallon, I would think one would clean it up in days.
The nightmare is EASILY solved by getting hold of the right peppermint shrimp.
Cheers,
LOS
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240 gallon reef with mixed inverts
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