Need reef fish recommendations!

[Gmandese]

Ok, I've drastically reduced the fish population in my 46 bow. I moved out pretty much all of the larger fish, and troublemakers, as far as a LPS reef goes. Here's what I have left:
a 3" Sailfin Tang
a Yellow damsel
2 green chromis'
a 3 line damsel
an engineer goby

I want to add some small reef-beneficial fish, and shrimp.
I have a 20g sump, with DIY ER skimmer. Also, I'm running an Emperor 400 for mechanical filtration, plus carbon filtration. Plus multiple powerheads for circulation.
What I'd like, are some recommendations on what fish I can add, for color, small size, and usefulness. I lost my cleanup crew when the lunar wrasse ate them all, but I've added about 20 sm snails, and a dozen hermits.
If you have any ideas, staying somewhat economical, I'd love to hear them. Even if anyone has some offerings!
Thanks!

 

[Tonyscoots84]

with DIY ER skimmer.

can u show some pics of this skimmer i want to make my own skimmer i no its pretty easy just need some ideas. thanks a bunch

 

[nycfatcow]

selling fish they are all reef safe..pm me if interested

 

[cali_reef]

I have a lot of fish in my system, some may think too many. Right now you have more fish(inches) per gallon than I do. I say wait a little before you get more fish or get rid of few more.

My sailfin tang went from 3" to almost 6" in one year, your tank will be too small for him.