keeping angels and butterflys alive

[joe 09]

i have a 175 gal,americal 400 wet dry,urchin pro skimmer.my water pramas are perfect the rates are less tha 20.the tank is 2yrs.old.i have been unable to keep the less hardy fish alive.they are eating well and just die.in the tank now i have
2 hippo tangs
1 fox face
1 yellow streak fairy wrasse
1 silver mono
1 coral beauty
1 maroon clown
thanks in advance for any replys

 

[clekchau]

what kind of angels/butterflies died on you?

 

[joe 09]

i just lost a spot banded (punctato) butterfly.in the past i have lost a peppered butterfly and a few angels.i feed them mysis,formula two, prime reef.ifeed small amounts 3x a day every other day.the other fish have been alive over a year.

 

[laredo300c]

i have nevered tried a butterfly, but my neighbor has a punctato alive for two years in a 125g, and all he feeds him is yum yum clams( i think ocean nutrition makes them) and brine shrimp once a week