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Quantum Aqua Pro pH Down

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$10.16
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$19.54
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$26.93
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$45.28 $4.53 / 100ml

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Standard shipping charges based on the product weight and shipping location shall be applicable to these products.

The shipping fees will be calculated before checkout

Goods Returned to Sender

In cases where goods are returned to the sender, such as non-collection, incorrect address, refusal, or carrier error, no restocking fee will be applied. The shipping charges for your order will be refunded only if VetSupply or the carrier is responsible for non-delivery.

Change of Mind Returns

Change of mind returns will be subject to a 10% restocking fee, and the shipping portion of your order is non-refundable.

We understand that returning a product can be frustrating, but we are unable to accept returns for change of mind under the following circumstances:

  • The product has been removed from its original packaging.
  • Labels or seals on the product have been tampered with or removed.
  • The product has clear signs of use, damage, or is soiled.
  • The product contains food or medication.
  • The end customer received the product more than 14 days ago.

Damaged or Incorrect Goods

Any goods that are sent incorrectly or arrive damaged will be replaced at VetSupply's expense. We will uphold our warranty obligations as defined under Australian consumer law. Please contact us regarding any warranty claims, and we will arrange pickup and replacement of the product in accordance with the manufacturer's warranty conditions.

We cannot accept warranty returns for pet accessories that have been damaged by an animal unless a manufacturing fault can be identified with the product. Such claims will be forwarded to the product manufacturer for investigation before accepting a return or replacement.

Returning a Product

Prior to initiating a change of mind return, please contact VetSupply. Goods should be sent to the following address:

Returns, 1/106-108, Station Road, Seven Hills, NSW 2147

Customers are responsible for the shipping costs associated with returning goods, except in cases where VetSupply has agreed to cover return postage costs due to an error on our part. Please note that VetSupply assumes no responsibility for loss or damage during the return transit.

Product refunds will be credited to the original payment method used for the purchase.

Cancelling an Order

Please get in touch with us promptly if you need to cancel an order, as orders cannot be refunded once they have been dispatched from our warehouse.

Quantum Aqua Pro pH Down

Quantum Aqua Pro pH Down is scientifically formulated to safely decrease pH for freshwater aquariums and planted tanks. Designed to create the ideal aquarium environment, it helps reduce stress in fish, improves nutrient availability for aquatic plants, and supports the overall health of aquarium inhabitants. Maintain the perfect balance for your aquatic ecosystem with Aqua Pro pH Down, a reliable solution for healthier fish and vibrant plants.

  • Shaking is not required.
  • Add directly into high water flow.
  • For accurate dosing, the dosing formula is total volume of aquarium and external filter minus all media, rock, ornaments, etc. that occupy volume.
  • This product cannot be used on a dosing pump.

Dosing:

100mL

Environment pH Range
African – Lake Malawi 7.8 – 8.5
African – Lake Victoria 7.8 – 8.5
African – Lake Tanganyika 8.5 – 9.2
South American 6.0 – 7.0
Goldfish & Koi 7.2 – 7.6
American & Australian 7.5 – 8.5
Tropical & Community 6.5 – 7.5
Low Tech Planted (No CO2) 6.8 – 7.5
High Tech Planted (CO2) 6.0 – 6.8
Freshwater Shrimp 6.5 – 7.5

10 drops per 10L or 2.6 US gal will lower aquarium water by ~0.2pH. The volume required may vary due to the environment of your aquarium. We recommend adding in smaller amounts, then testing pH and adjusting based on your results. Do not alter pH by more than 0.3 per day.

Note: 20 drops = ~1mL.

250mL, 500mL and 1L

Environment pH Range
African – Lake Malawi 7.8 – 8.5
African – Lake Victoria 7.8 – 8.5
African – Lake Tanganyika 8.5 – 9.2
South American 6.0 – 7.0
Goldfish & Koi 7.2 – 7.6
American & Australian 7.5 – 8.5
Tropical & Community 6.5 – 7.5
Low Tech Planted (No CO2) 6.8 – 7.5
High Tech Planted (CO2) 6.0 – 6.8
Freshwater Shrimp 6.5 – 7.5

½ capful per 100L or 26 US gal will lower aquarium water by ~0.2pH. The volume required may vary due to the environment of your aquarium. We recommend adding in smaller amounts, then testing pH and adjusting based on your results. Do not alter pH by more than 0.3 per day. 

Note: 1 capful = ~10mL.

  • Gently reduces pH of the aquarium
  • Ensures a consistent environment for nutrient uptake
  • Creates a healthy and stress-free aquatic environment
  • Safe and reliable formulation
  • Suitable for all types of freshwater aquarium
  • Liquid formula allows precise, quick dosing
  • Read the instructions given on the pack carefully.
  • For easier dosing, informational videos, safety instructions, and help, download ‘Quantum Aqua’ app.
Product Type Aquarium Environmental Parameter Essential
Ingredients Deionised Water, Buffered Sulfuric Acid
Brand Quantum Aqua
MAX PET SUPPLIES PTY LTD. ABN: 86 603 803 738 © 2025 VetSupply.com.au - All Rights Reserved.
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