Oyster Shell Flour for Worm Bins

Oyster shell flour from Utah Worm Company is a finely ground worm-bin supplement that provides calcium and fine grit while helping buffer acidity as organic material breaks down.

For worm-bin maintenance

• Natural calcium source for a worm colony.
• Fine grit for worm digestion.
• Helps buffer acidic conditions in bedding.
• Available in 1, 5, and 10 pound options.

Supplier’s use directions

Sprinkle 1–2 tablespoons over the surface of the worm bin every 2–4 weeks, adjusting for bin size and feeding. Gently mix into the top layer of bedding or leave on the surface before feeding.

This is a supplement for worm bins, not a replacement for worm food. Pair with Big J’s Organic Worm Chow. This listing is for worm care; do not add it to your axolotl aquarium.

Explore worm care supplies or shop axolotl food.

Partner shipping

Ships directly from our partner, Utah Worm Company. These items may arrive separately from axolotls and other products in your order. Check the selected option for availability or ship dates; delivery options and charges are shown at checkout.