Description
Seachem Acid Buffer 600g — High-Capacity pH Lowering & Alkalinity Control Supplement Reduces KH In Large Freshwater Systems & Gives Natural Boost to Aquatic Shrubs
Seachem Acid Buffer 600g (SKU: 724991-243) is an economical, high-capacity non-phosphate chemical buffer designed to reduce pH and lower carbonate hardness (KH) in large freshwater systems. Hard municipal water supplies often contain high levels of carbonates that keep pH above preferred levels. Acid Buffer allows aquarists to gently reduce pH without introducing phosphates that stimulate algae growth.
In addition to adjusting pH, Acid Buffer converts carbonate alkalinity into bioavailable dissolved carbon dioxide (CO2), giving a natural boost to aquatic plants & shrubs. Paired with Seachem Alkaline Buffer, it provides a complete water treatment system for custom pH maintenance.
Usage & Application
When to Use
- Large Soft-Water Aquariums: Ideal for large aquariums holding South American, Southeast Asian, or discus species.
- Hard Water Conditioning: Effectively lowers elevated pH and KH levels in hard municipal tap water.
Dosing & Application Guide
- Add 1/4 teaspoon (2 g) per 80 L (20 US gallons) daily until desired pH is attained.
- Check pH and KH levels regularly using accurate test kits during adjustment periods.
Product Specifications & Highlights
Key Features
- Algae-Safe Formula: 100% free of phosphates, keeping aquascapes clean and clear.
- CO2 Generation: Converts carbonate ions into dissolved carbon dioxide for plant photosynthesis.
- System Integration: Integrates with Seachem Alkaline Buffer for precise water chemistry tuning.
- Cost-Effective Bulk Size: 600g tub offers low cost per treatment for medium to large setups.
Product Details
- Brand: Seachem
- SKU: 724991-243 (Internal ID: 130737)
- Barcode (GTIN/UPC): 000116024303
- Product Type: Aquarium Water Conditioner > pH Decreaser
- Package Dimensions: 90 mm (L) × 90 mm (W) × 160 mm (H)
- Gross Package Weight: 680 g
- Net Weight: 600 g
- Target Environment: Freshwater & Planted Aquariums
- Treatment Capacity: 600 g treats up to 24,000 litres (6,000 US gallons)


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