FT- Melanarurs wrasse for smaller wrasse

[Major nc]

Looking to trade my healthy disease free melaranus. 4" to 4 1/2". 3 years old approx. He's great with all his current tank mates but not nice to my new wrasse. Going to be a problem as I plan on adding more small wrasse. I got lots of snails. He doesn't touch them but not sure with shrimp as I don't have any. Great for pest control and bristleworms if you have too many.
https://m.imgur.com/a/REacv