Newmarket, Ontario (Head Office)
1175 Stellar Drive, Unit #5
Newmarket, ON L3Y 7B8
- Mon10:00am–6:00pm
- Tue10:00am–6:00pm
- Wed10:00am–6:00pm
- Thu10:00am–6:00pm
- Fri10:00am–6:00pm
- Sat10:00am–4:00pm
- SunClosed
$0.00 CAD
Out of stock at your chosen pickup location? We'll automatically transfer inventory from another location so it's ready at your selected pickup location. (Ontario Only)
1175 Stellar Drive, Unit #5
Newmarket, ON L3Y 7B8
106 Saunders Road, Unit #2A
Barrie, ON L4N 9A8
719 Krosno Boulevard
Pickering, ON L1W 1G4
915 McLeod Avenue, Unit #4
Winnipeg, MB R2G 0Y4
Advanced Nutrients pH Down is a highly concentrated pH adjuster designed for lowering pH to support optimal nutrient absorption and help prevent nutrient lockout. It’s a straightforward pH control solution for growers who want tighter pH management as part of consistent plant performance.
This pH down formula is engineered with phosphoric acid and built around highly stable buffers for more precise pH control. The concentrated profile is made to deliver longer use from each bottle while keeping pH levels more consistent in real-world gardens. For shoppers who like a compact facts layer, this product is listed with an NPK of 0-55-0.
Advanced Nutrients positions pH Down for both vegetative stage and blooming stage gardens, with indoor / outdoor suitability. It’s also described as coco coir safe, and it’s specially designed for use with diverse hydroponic growing media. That makes it relevant for a wide range of modern setups where pH stability plays a direct role in nutrient availability.
pH Down is also described as suitable for continuous liquid-feed growing systems such as aeroponics, drip irrigation and emitters, nft, flood and drain, and deep water culture. This is a good fit for growers who want a phosphoric-acid-based pH reducer with stable buffers for hydroponics and other watering-system environments where consistent pH supports reliable nutrient absorption.
Available Phosphate (P₂O₅) supports root development, energy transfer, and early structural growth by providing a form of phosphorus that plants can absorb and use quickly.
Yes, it can if it pushes phosphorus too high or drives pH too low, because both conditions can reduce the plant’s ability to take up key micronutrients and calcium even when they’re present in the feed, which makes phosphoric acid uniquely powerful compared with slower, gentler phosphorus sources.

1175 Stellar Drive, Unit #5
Newmarket, ON L3Y 7B8
106 Saunders Road, Unit #2A
Barrie, ON L4N 9A8
719 Krosno Boulevard
Pickering, ON L1W 1G4
915 McLeod Avenue, Unit #4
Winnipeg, MB R2G 0Y4