Description
Quantum Amazon River pH Buffer 5L — Bulk pH Pro for Discus Breeders and Soft-Water Fish Rooms
A discus breeder with twenty tanks doses pH buffer by the cup, not the capful, and the 5 L container exists for that. Quantum Amazon River pH Buffer 5L (SKU: QA335000) is the bulk size of Quantum’s Amazon River pH Pro, a solution of safe pH buffer salts in deionised water formulated to regulate pH and replicate the slightly acidic water of the Amazon rivers. Regulating KH and pH together keeps the pH from fluctuating and protects the biochemical processes the fish rely on, which is why Quantum pairs this with Amazon River KH Pro and Amazon River Pro Salt GH and recommends a slightly acidic substrate.
The rate is unchanged from the bottles: 10 mL per 100 L once a week, or as required, to hold pH between 6.3 and 6.7, used as a maintenance supplement, and only the replacement volume dosed at a water change. A fish room with 2,000 L of soft-water tanks uses 200 mL a week, so 5 L lasts about twenty-five weeks; a shop’s Amazon system gets similar mileage. Tanks tested before dosing and found already in range simply skip that week, which extends the container further.
Usage & Application
When to Use
- Discus and dwarf cichlid breeders: Fish rooms holding many tanks at an acidic pH.
- Retail soft-water systems: Shop tanks keeping Amazon species between 6.3 and 6.7.
- Very large Amazon displays: Planted or biotope tanks past 1,000 L kept at an acidic pH year round.
- Central water treatment: Dosing a reservoir that supplies several soft-water aquariums.
Dosing & Administration Guide
- Per tank, per week: 10 mL per 100 L, or as required, to hold each tank at pH 6.3 to 6.7.
- Test each system: Dose only the tanks that have drifted; skip the ones in range.
- Change water only: At a change, treat the replacement volume rather than the whole tank.
- Run the full set: Amazon River KH Pro and Pro Salt GH in the same routine.
Product Specifications & Highlights
Key Features
- Bulk pH regulation: 5 L of safe pH buffer salts for soft-water systems dosed weekly at volume.
- Same weekly rate: 10 mL per 100 L, as on the smaller bottles.
- Holds 6.3 to 6.7: The Amazon band Quantum recommends for soft-water species.
- Fish-room economy: Months of weekly dosing across many tanks from one container.
- Three-part system: Designed alongside Amazon River KH Pro and Pro Salt GH.
Product Details
- Brand: Quantum (Freshwater Essential range)
- SKU: QA335000
- Barcode (GTIN/UPC): 0706502801939
- Product Type: Additives & Supplements > Freshwater pH Buffer
- Manufacturer Name: Amazon River pH Pro
- Net Volume: 5 L
- Contents: Deionised water, safe pH buffer salts
- Dose Rate: 10 mL per 100 L once a week or as required; during a water change, dose only the volume replaced
- Target Range: pH 6.3–6.7
- Companion Products: Amazon River KH Pro; Amazon River Pro Salt GH
- Support: Free Quantum Aqua dosing app with instructional videos
- Target Environment: Amazon and soft-water freshwater aquariums


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