Check your params... sometimes a Nitrite buildup will cause them to lose their appitites... (speaking from personal experience

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Sorry about your loss HB... I didn't see your post till just a few mins ago about needing more info, basically I use a bulbend (like a mini turkey baster) load it up with some tubefix worms and stick it in their mouths and squeeze ... simple process... unfortunatly they will let ALOT go out their gills and or spit most of it out once you get the tip out of their mouth... but some stays in and goes down.. so I'll keep doing it till I feel they have had enough till the next meal and will start the process over again.