Description
Quantum Aqua Pro GH 500ml — Freshwater GH Remineraliser for Planted, Community and Cichlid Tanks
Plants strip calcium and magnesium from the water as steadily as fish do, and a planted tank on RO runs dry of both within weeks. Quantum Aqua Pro GH 500ml (SKU: QA420500) is the 500 mL size of Quantum’s Freshwater Essential Plant Essential Aqua Pro GH, a solution of bioavailable magnesium and calcium with trace elements in deionised water, formulated to raise general hardness gently and supply the essential elements every freshwater inhabitant needs. Its purity and balanced formulation let it serve any type of freshwater tank, and Quantum gives a GH target for each.
A capful of about 10 mL per 100 L raises GH by roughly 2.5 dGH, added directly into high water flow without shaking. At a water change only the replacement volume is dosed, and it is never used to replace evaporated water. The published targets run from 1 to 3 dGH for South American tanks, through 4 to 8 for community, shrimp and high-tech planted, up to 7 to 12 for Tanganyika. A 300 L planted tank changing 75 L a week from RO to 6 dGH uses 18 mL, so the bottle covers about twenty-seven changes. It is not for dosing pumps.
Usage & Application
When to Use
- Mid-sized planted tanks: High-tech and low-tech scapes of 200 to 400 L that consume minerals quickly.
- Community and cichlid tanks: Any freshwater biotope, dosed to its published GH range.
- RO and rainwater households: Source water with no hardness of its own.
- Shrimp breeding: Colonies that need steady calcium for clean moults and healthy shrimplets.
Dosing & Administration Guide
- Match the table: Test GH and choose the range for the tank type.
- 10 mL per 100 L per 2.5 dGH: Calculate on the change volume and the rise needed.
- Add into circulation: No shaking; treat the new water only, never evaporation top-ups.
- Pair with KH: Aqua Pro KH alongside so carbonate hardness rises with general hardness.
Product Specifications & Highlights
Key Features
- Bioavailable calcium and magnesium: With trace elements, in a high-purity balanced formula.
- 2.5 dGH per capful per 100 L: A strong dose that makes remineralising RO quick.
- Ten published targets: A GH range for every freshwater tank type.
- Half-litre economy: Months of weekly changes on a mid-sized tank.
- Aqua Pro companion set: Works with Aqua Pro KH, pH Up and pH Down.
Product Details
- Brand: Quantum (Freshwater Essential Plant Essential range)
- SKU: QA420500
- Barcode (GTIN/UPC): 0769807350595
- Product Type: Additives & Supplements > Freshwater GH Mineral Salt
- Net Volume: 500 mL
- Contents: Deionised water, bioavailable magnesium and calcium, trace elements
- Dose Rate: 1 capful (about 10 mL) per 100 L raises GH by about 2.5 dGH; dose change water only, not evaporation top-ups
- Capful: About 10 mL
- Target Ranges: South American 1–3; American/Australian 2–4; Victoria, goldfish and low-tech planted 3–6; community, shrimp and high-tech planted 4–8; Malawi 5–10; Tanganyika 7–12 dGH
- Dosing Pump: Not suitable
- Target Environment: Planted, fish-only, shrimp and pond freshwater aquariums


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