Looking for live blackworms for freshwater aquarium fish? Start with the food, the pack size, and a plan for storage. This guide explains what to check before you buy and how to fit live food into an established feeding routine.
Live blackworms for sale: what you are ordering
Blackworm Supply’s live blackworms are Lumbriculus variegatus. Our current packs are sold by weight: 1/4 lb, 1/2 lb, 3/4 lb, and 1 lb. Select the size on the product page and review the price and shipping total before completing your order.
You may see searches for “blackworms” or “black worms.” Check the actual product description instead of relying on spelling alone. Live worms, frozen foods, and dried foods have different handling needs. This page is about live blackworms, not a frozen or freeze-dried substitute.
Choosing live food for aquarium fish
If you keep bettas, discus, or other freshwater tropical fish, first check whether live blackworms fit the needs of your particular species, size, and feeding plan. Aquarium fish do not all eat the same foods. Ask an experienced keeper or your aquatic veterinarian when you need species-specific advice.
Choose an appropriate feeding portion and observe the fish. Use live foods as part of a species-appropriate diet rather than assuming one food covers every nutritional need. An animal’s interest in a new food is useful to observe, but it does not tell you how much or how often that animal should eat it.
How to feed live blackworms without adding storage water
- Take out only the portion you intend to offer.
- Rinse the portion with clean, dechlorinated water.
- Keep shipping and storage water out of the aquarium.
- Use a clean feeding tool and watch where the food goes.
- Remove uneaten food and continue your normal water-quality checks.
Keep aquarium water out of the container holding your remaining worms. Read our blackworm care and storage guide for refrigeration, water changes, and daily checks.
Which blackworm pack size should I buy?
Choose around the number of animals you feed and the quantity you can care for. A smaller pack can be a practical starting point while you learn your routine. A larger pack needs suitable cold storage and regular attention; buying more does not remove the work of keeping live food in good condition.
For repeat orders, note the pack size, delivery date, and how much you actually use. That record is more useful than a universal promise about how long a pound of worms should last. Contact us before placing a larger-quantity order if you need help reviewing current options.
U.S. farm sourcing and delivery planning
The farms we source our worms from are in the United States. Read our U.S. farm sourcing story for more about that focus. Before ordering, review shipping information and arrange to open the delivery promptly.
Shop available live blackworm pack sizes · Read ordering FAQs · Ask a product question