Hello guys! I got my 4"+ Bicuda and 4" Falcirostris last 6 days ago and im starving them until now until they reach the 10th day of starving just like i did to my Vittatus to eat Market Prawns. How long it will take my Bicuda and Falcirostris to eat prawns? Any experience to them? Their tankmates is 5"+ Vittatus and 13" Fire eel and these two tankmates eat prawns. Thanks! 
Here's some picture of the 2 when i first got them :
Bicuda
Falcirostris
Here's some picture of the 2 when i first got them :
Bicuda
Falcirostris

