Description
Seachem Replenish 250mL — Liquid General Hardness (GH) Conditioner For Soft or Purified Reverse Osmosis (RO/DI) Waters Of Aquarium Tanks
Seachem Replenish 250mL (SKU: 725157-1476) is a liquid mineral supplement formulated to restore General Hardness (GH) in soft or purified reverse osmosis (RO/DI) water. Un-mineralised RO water can cause osmotic stress, cell rupture, and compromised shell development in aquatic life. Replenish restores bioavailable calcium and magnesium, establishing a stable mineral foundation for freshwater aquariums.
Sized for standard home aquariums, the 250mL bottle offers easy, cap-measured dosing. Its sodium-free formulation increases total dissolved solids and GH cleanly, without altering water pH or adding unwanted sodium ions.
Usage & Application
When to Use
- RO Water Preparation: Adds essential minerals back into purified RO top-off or water-change water.
- Shrimp & Invertebrate Care: Provides calcium needed for successful exoskeleton moulting.
- Community Tank Maintenance: Corrects low GH in soft tap water environments.
Dosing & Administration Guide
- Standard Dosage: Add 5 mL (1 capful) per 40 L of water to raise General Hardness (GH) by 2.8 dGH (1 meq/L).
- Dosing Method: Mix into fresh makeup water prior to adding to the aquarium during water changes.
- Monitoring: Measure GH with a reliable liquid test kit to maintain target hardness ranges.
Product Specifications & Highlights
Key Features
- Balanced Calcium & Magnesium: Restores minerals essential for fish osmoregulation and plant growth.
- Sodium-Free Formula: Raises GH without adding excess sodium to the water.
- Fast-Dissolving Liquid: Blends instantly with purified water without clouding.
- Ideal for Home Aquariums: Convenient 250mL size with cap-measured dosing.
Product Details
- Brand: Seachem
- SKU: 725157-1476
- Barcode (GTIN/UPC): 000116147606
- Product Type: Additives & Supplements / Water Conditioners
- Package Dimensions: 54.12 mm (L) × 54.12 mm (W) × 181.61 mm (H)
- Gross Package Weight: 370.00 g
- Net Volume: 250 mL
- Target Environment: Freshwater Community, Planted & Shrimp Aquariums
- Treatment Capacity: 250 mL treats up to 2,000 Litres (500 US gallons)


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