I have a Royal Gramma which eats them. They were multiplying rapidly in my tank at one point and I was squashing them on the glass and sucking them out, to no avail. One day my RG decided they were food and they were all gone in about 2 weeks.
Your mileage may vary.
lucky. my royal gramma doesn't, and I havent' been able to tell if my new sixline wrasses do either...
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Everything I put in my tank is fully dependant on me.