How to Keep Bloodworms: Mastering Water Quality, Feeding, and Daily Care Is Key

Bloodworms are the larvae of non-biting midges, named for their bright red body color. They mostly live in the bottom mud of ponds, ditches, and other water bodies, have a high protein content, and are often used as fishing bait and as live food for ornamental fish. To keep bloodworms well, the key is to mimic their original cool, clean aquatic environment.

As for containers and water, for home keeping you can use a shallow basin, a plastic box, or a small water tank. The container should not be too deep; a water depth of just a few cm is enough, making it easy for the bloodworms to move around. Pond water or river water is best as the water source. If you use tap water, it is best to let it sit in the sun for two or three days beforehand to remove chlorine before pouring it into the container.

As for feeding, bloodworms mainly feed on organic debris, algae, and microorganisms in the water. In daily care, you can feed small amounts of yeast powder, soy milk, or rice water. It is better to feed less rather than more; too much leftover food will quickly foul the water quality and instead affect the bloodworms' survival.

For daily management, bloodworms are afraid of heat and should be kept in a cool, ventilated place. In summer, avoid direct sunlight, and if the water temperature gets too high, you can lower it by changing the water. Generally, change the water once every one or two days, and while changing the water, clean out the debris at the bottom at the same time. If you find dead worms, pick them out promptly to prevent them from contaminating the living environment of the whole group of bloodworms.

A common problem is oxygen deprivation caused by too high a rearing density. If large numbers of bloodworms float to the surface or move sluggishly, you should change the water immediately and divide them into several containers. Overall, by keeping the water clean, the water temperature cool, and feeding an appropriate amount, bloodworms can survive for a relatively long time and be used as needed, making them a convenient and practical source of live bait for fishing and feeding fish.