Description
Quantum Amazon River KH Conditioner 5L — Bulk KH Pro for Discus Breeders and Soft-Water Fish Rooms
Discus breeders change more water than almost anyone in the hobby, most of it RO, and all of it needing a touch of KH. Quantum Amazon River KH Conditioner 5L (SKU: QA325000) is the bulk size of Quantum’s Amazon River KH Pro, a solution of safe KH salts in deionised water formulated to raise carbonate hardness gently to the low level of Amazon river water. That small KH is what keeps pH from fluctuating and the fish’s biochemical processes running efficiently, and the product is designed to be used with Amazon River pH Pro and Amazon River Pro Salt GH.
The rate is the same as the bottles: 10 mL per 100 L raises KH by 0.5 dKH, the recommended range is 0.5 to 2 dKH, and only the replacement water is dosed at a change. A fish room conditioning 1,000 L of RO a week to 1.5 dKH uses 300 mL, so 5 L lasts around sixteen weeks; a single large discus system at 150 L a week gets well over a year. The 5 L container suits a mixing barrel, where a week’s change water is treated in one go.
Usage & Application
When to Use
- Discus and dwarf cichlid breeders: Fish rooms on daily or twice-weekly RO changes across many tanks.
- Retail soft-water systems: Shop tanks holding discus, tetras and Amazon species at low KH.
- Very large Amazon displays: Planted or biotope tanks past 1,000 L on big weekly changes.
- RO mixing stations: Treating a reservoir that feeds several soft-water tanks.
Dosing & Administration Guide
- Set the KH: Between 0.5 and 2 dKH for the species kept, the same on every tank fed from the barrel.
- Dose the barrel: 10 mL per 100 L for each 0.5 dKH of rise, on the volume conditioned.
- Replacement water only: Treat what goes in, not what is already in the tank at target.
- Complete the chemistry: Amazon River pH Pro and Pro Salt GH in the same barrel.
Product Specifications & Highlights
Key Features
- Bulk soft-water KH: 5 L of safe KH salts in solution for high-volume RO conditioning.
- Half-degree steps: 10 mL per 100 L raises KH by 0.5 dKH, unchanged from the bottles.
- Amazon range: 0.5 to 2 dKH, published by Quantum for soft-water species.
- Fish-room economy: Months of RO conditioning from one container.
- Three-part partner: Runs with Amazon River pH Pro and Pro Salt GH in the same mixing barrel.
Product Details
- Brand: Quantum (Freshwater Essential range)
- SKU: QA325000
- Barcode (GTIN/UPC): 0706502801946
- Product Type: Additives & Supplements > Freshwater KH Conditioner
- Manufacturer Name: Amazon River KH Pro
- Net Volume: 5 L
- Contents: Deionised water, safe KH salts
- Dose Rate: 10 mL per 100 L raises KH by 0.5 dKH; during a water change, dose only the volume replaced
- Target Range: 0.5–2 dKH
- Companion Products: Amazon River pH 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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