White worm are not hard at all but you do need to keep them coolish around 60/66 always keeps them produceing fast,I harvest hundreds a day every day and they are from 2-3 mm upto around 20mm so a great item for fry upto aduts for any species of fish.you need to moniter them for crashing and that ...

What I do with any of my fish that need to be dispatched is put them in a container take them into the yard put them quickly in hand and very forcibly throw them down onto a hard surface it sounds quite ruthless but I always feel after it was dispatched very quickly,it does kill them instantly ...