125 Gallon aquarium additions

[Gordon Marvin]

I currently have a 125 gallon saltwater FOWLR aquarium, it has 100lbs of crushed coral Substrate, about 90lbs of live rock, and some coral skeletons totaling about another 35-40lbs, I am running it with two fluval 60-110 hang on back filters, an instant ocean seaclone 100 protein skimmer, and a fluval 407 canister filter. I am looking to add 4-5 or so more fish to the tanks current stock, the current stock is:
1 Pacific ocean sailfin tang
1 Convict tang
2 Black and white ocellaris clownfish
1 Yellowtail damselfish
1 Firefish
1 Lemonpeel angelfish

I am looking for suggestions, potentially one more tang species, large angelfish or butterflyfish and fish that will sift substrate and control pests.

 

[littlefoxx]

Bristletooth tangs eat algae! Ive got a regal and a french angel in my 125. Just kinda depends on what kind of fish you like!

 

[jtf74]

My favorite addition has been my yellow longnose butterfly. Its a great alternative to a yellow tang for similar color and shape. Mine squirts water at the surface at me and will swim into a box for food. Not sure what pest control you are looking to get rid of?