Oyster Shells 1kg

🍃Raises pH & Hardness – Oyster shells contain calcium carbonate, which slowly dissolves in water, increasing GH (General Hardness) and KH (Carbonate Hardness). This helps maintain a stable pH, especially in tanks with soft or acidic water.
🍃Provides Calcium for Invertebrates – Snails, shrimp, and some fish species need calcium for shell and bone development. Oyster shells are a natural source.

How to Use:

🐚Whole Shells – Place them in the substrate or decor for slow calcium release.

When to Avoid Using Oyster Shells

🚫Softwater Tanks – If you keep softwater fish (like bettas, tetras, or certain shrimp species), oyster shells might raise hardness too much.

🚫pH-Sensitive Fish – Some fish, like discus, prefer more acidic conditions, so adding oyster shells might not be ideal.