Not sure what kind of clown you have and what exact type of Malu you have. But this is a list of clowns that will host in certain nems.
Entacmaea Quaricolor
•A Bicinctus
•A Clarkii
•A Ephippium
•A Frenatus
•A Melanopus
•A Tricintus
•P Biaculeatus
Stichodactyla Sp
•A Bicinctus
•A Clarkii
•A Occelaris
•A Percular
•A Perideraion
•A Sandaracinos
•A Sebae
•A Tricinctus
Macrodactyla Doreensis
•A Clarkii
•A Perideraion
•A Polymnus
Heteractis Magnifica
•A Akallopisos
•A Bicinctus
•A Clarkii
•A Melanopus
•A Nigripes
•A Occelaris
•A Percular
•A Perideraion
Heteractis Malu
•A Clarkii
Heteractis Crispa/Malu
•A Bicinctus
•A Clarkii
•A Ephippium
•A Melanopus
•A Percular
•A Perideraion
•A Polymnus
•A Sandaracinos
•A Tricinctus
Hope that helps
Entacmaea Quaricolor
•A Bicinctus
•A Clarkii
•A Ephippium
•A Frenatus
•A Melanopus
•A Tricintus
•P Biaculeatus
Stichodactyla Sp
•A Bicinctus
•A Clarkii
•A Occelaris
•A Percular
•A Perideraion
•A Sandaracinos
•A Sebae
•A Tricinctus
Macrodactyla Doreensis
•A Clarkii
•A Perideraion
•A Polymnus
Heteractis Magnifica
•A Akallopisos
•A Bicinctus
•A Clarkii
•A Melanopus
•A Nigripes
•A Occelaris
•A Percular
•A Perideraion
Heteractis Malu
•A Clarkii
Heteractis Crispa/Malu
•A Bicinctus
•A Clarkii
•A Ephippium
•A Melanopus
•A Percular
•A Perideraion
•A Polymnus
•A Sandaracinos
•A Tricinctus
Hope that helps