All fish love blackworms! Blackworms are a protein rich livefood that will enchant even picky eaters. Colonies can be kept alive and grown to supply a constant source of live food for your fish!

Instructions from ZYN:

1) Keep colony in your refridgerator 

2) Keep a piece of brown paper (unbleached paper towel, brown napkin, etc) in with the worms

3) Replace the water inside the cup with fresh water (just pour off the dirty water and replace)

Your colony will produce around 3-5 worms a day - they breed by breaking in half which will happen as you pull worms to feed, or replace the water.