Regular cleaner wrasse (blue streak cleaner wrasse) is a regular item in most lfs. Ah beng shld have a few. Unless u are looking for the hawaiian cleaner wrasse, that, you have to go to CF, saw 2 a few days back....
vinegar is definitely safe, much safer then biopellets. been dosing 8 months vinegar, sometimes my skimmer overflows and skimmates all go back to tank, my tank handles it well.