I have a 29g Biocube, started up 6 wks ago. Things are going pretty well - I've got a lot of cyano algae but understand that is expected. I bought a serpent starfish yesterday along with some snails. Almost immediately after adding them to my tank, my peppermint shrimp came over and started what appeared to be an attack on my starfish. I let it go for 2 mins or so and when I scared the shrimp away the starfish had a chunk out of it's leg. I continued to watch the interaction and ended up putting the starfish in an underwater container for frys to protect it. This morning I tried reintroducing it to the tank and the shrimp immediately came over.

I have been told not to feed the shrimp because I want them to clean my tank.

Does anyone have suggestions? I've looked up the other variety of shrimps and am fairly certain that these are indeed peppermint shrimp.

Thanks!