I have a harliquen shrimp but I wouldn't suggest getting one to get rid of your issue. Let them be. If it gets too outta control then I'm sure there are other avenues I'm sure. Spend money on the shrimp and then 10-20 bucks on a star to feed your shrimp maybe not worth it in the end.
Plus you have to keep an extra eye on water parameters as the decaying stars body can foul up your water a little.
Don't get me wrong, I love mine. But I bought mine because I wanted it and so did the wife. Just gets expensive after awhile.
Mine cost me a few bucks.