Crushed Oyster Shells: Natural Calcium Supplement for Poultry, Aquariums, Gardens

from $2.00
- Multi-Purpose Calcium Powerhouse – Pure, sun-dried oyster shells ground to 2–4 mm grit; ideal for stabilizing aquarium pH / GH, boosting eggshell strength in chickens, and sweetening acid soils. Hermit Crabs love to eat it or add it to your aquarium to improve snail health.
- Aquarium Safe – Food-grade shells kiln-dried. Slow-release carbonate keeps hard-water snails, cichlids, and livebearers thriving.
- 100 % Natural & Sustainably Sourced – Heat-sterilized, with zero additives or dyes—safe for fish, shrimp, reptiles, and organic gardens.
- Resealable Stand-Up Pouch – Moisture-proof zip-top bag stores cleanly in the fish room or coop
- Pulverize the shells even further for an extremely low cost calcium supplement for your reptiles
Size:
Form:
- Multi-Purpose Calcium Powerhouse – Pure, sun-dried oyster shells ground to 2–4 mm grit; ideal for stabilizing aquarium pH / GH, boosting eggshell strength in chickens, and sweetening acid soils. Hermit Crabs love to eat it or add it to your aquarium to improve snail health.
- Aquarium Safe – Food-grade shells kiln-dried. Slow-release carbonate keeps hard-water snails, cichlids, and livebearers thriving.
- 100 % Natural & Sustainably Sourced – Heat-sterilized, with zero additives or dyes—safe for fish, shrimp, reptiles, and organic gardens.
- Resealable Stand-Up Pouch – Moisture-proof zip-top bag stores cleanly in the fish room or coop
- Pulverize the shells even further for an extremely low cost calcium supplement for your reptiles