What Invertebrates to put in

[Keysman]

Hi I have a 55 gallon tank with a saddle Valentini puffer in it looking at getting a small lion fish my be the zebra or Antennata I've got a diatom outbreak in my tank and was wondering if I could put any invertebrates in the I've heard it my be a problem

 

[Jason7894561230]

Im not sure of this but would the lionfish eat the inverts?

 

[Keysman]

Yes I've heard that but is there any inverts at all that I can put in my tank to clean up my outbreak