Single Feed Bags 
 
Single feed bags each holding approx. 115ml of water.
 
Glassworm is a Chironomid (Midge) larvae. It shares a similar nutritional profile to the former, but is:
 
A. More active in the aquarium - more attractive to your fish
B. A less chitinous body than bloodworm allows for easier digestion
C. More hardy animals allows them stay fresh in the bags for longer!