---
product_id: 597234180
title: "General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon"
brand: "general hydroponics"
price: "A$259"
currency: AUD
in_stock: false
reviews_count: 5
category: "General Hydroponics"
url: https://www.desertcart.com.au/products/597234180-general-hydroponics-ph-down-liquid-premium-buffering-for-stability-1
store_origin: AU
region: Australia
---

# Precise pH lowering control Food-grade phosphoric acid Promotes pH stability General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon

**Brand:** general hydroponics
**Price:** A$259
**Availability:** ❌ Out of Stock

## Summary

> 🌿 Master your grow with precision pH power!

## Quick Answers

- **What is this?** General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon by general hydroponics
- **How much does it cost?** A$259 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/597234180-general-hydroponics-ph-down-liquid-premium-buffering-for-stability-1)

## Best For

- general hydroponics enthusiasts

## Why This Product

- Trusted general hydroponics brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Food-Grade Safety:** Formulated with premium food-grade phosphoric acid for safe, reliable use.
- • **Consistent Stability:** Maintains stable pH levels to maximize nutrient uptake and growth consistency.
- • **Precision pH Control:** Easily adjust nutrient pH to the ideal 5.5-6.5 range for optimal plant health.
- • **Trusted by Thousands:** 4.7-star rating from over 3,200 users—join the hydroponic elite who rely on it.
- • **Economical 1-Gallon Size:** Generous volume ensures long-lasting supply for serious growers and pros.

## Overview

General Hydroponics pH Down Liquid is a premium buffering solution using food-grade phosphoric acid to safely and effectively lower and stabilize nutrient pH levels between 5.5 and 6.5. Trusted by thousands of hydroponic growers, this 1-gallon liquid formula ensures consistent plant health and optimal nutrient absorption.

## Description

The Acid formulation uses food grade Phosphoric acid to lower the pH to the proper level. Widely recognized as a consistent and reliable product.

Review: Great Value & Reliability
Review: PH Down

## Features

- Acid formulation uses food grade phosphoric acid
- Add when your nutrient pH is too high in order to lower the pH to the proper level
- Promotes pH stability
- Adjust by adding a little at a time
- Recommended pH for most plants is 5.5 to 6.5 pH

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000FG0F9U |
| Brand | General Hydroponics |
| Brand Name | General Hydroponics |
| Customer Reviews | 4.7 out of 5 stars 3,296 Reviews |
| Global Trade Identification Number | 00793094015332 |
| Item Form | Liquid |
| Item Type Name | Premium Buffering For Stability |
| Item Weight | 2 Pounds |
| Item form | Liquid |
| Item weight | 2 Pounds |
| Manufacturer | Hawthorne Hydroponics, LLC |
| Number of Items | 1 |
| UPC | 714863970218 793094015332 |
| Unit Count | 3785.41 Milliliters |

## Product Details

- **Brand:** General Hydroponics
- **Global Trade Identification Number:** 00793094015332
- **Item form:** Liquid
- **Item weight:** 907 g
- **UPC:** 714863970218 793094015332

## Images

![General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon - Image 1](https://m.media-amazon.com/images/I/31v9Fb2iWLL.jpg)
![General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon - Image 2](https://m.media-amazon.com/images/I/618nRcRF4jL.jpg)
![General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon - Image 3](https://m.media-amazon.com/images/I/71E-fJ-tlsL.jpg)
![General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon - Image 4](https://m.media-amazon.com/images/I/71R4KBdLv7L.jpg)
![General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon - Image 5](https://m.media-amazon.com/images/I/71fkDkIWm9L.jpg)

## Questions & Answers

**Q: What is the amount per gallon mixing ratio?**
A: I use up to 3-4ml per gallon sometimes, depending on my nutrients, water and stage of plant growth. It will vary depending on what you're growing and where your particular plant's needs fall on the nutrient/ph charts. For hydroponics/coir it is recommended by manufacturer to range between 5.5 and 6.5.

**Q: can you list ingredients with %.  Thank you!**
A: exact amounts are a trade secret however the MSDS on this states:Phosphoric acid 10 - 30%Ammonium dihydrogenorthophosphate 5 - 10%Citric acid 5 - 10%in comparison the dyna-gro ph down has:Phosphoric Acid H3PO4 33%Nitric Acid HNO3 11.5%That being said there are benefits to some of these ingredients. N-NitrogenP-PhosphorusK-PotassiumPhosphoric acid provides: PAmmonium dihydrogenorthophosphate provides: N and PCitric acid: other than lowering ph, does nothing useful. made from oxygen and hydrogen not in any usable form as far as I can find.Nitric Acid provides: NOverall either product seems to provide similar benefits.Dyna-gro is half the cost.

**Q: ingredients? Concentration?**
A: It’s not organic if that’s what you mean ingredients. I haven’t used this in a long time. I want to say I’d use like 20ml for 5 gallons. I switched to another branf

**Q: Is this safe for aquaponics systems?**
A: I would think so. I use it to lower the pH of the water I use to water my plants sometimes, both inside and out.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Value & Reliability
*by M***D on 26 January 2026*



### ⭐⭐⭐⭐⭐ PH Down
*by C***N on 16 January 2026*



### ⭐⭐⭐⭐⭐ This is the only pH Down that I use
*by C***E on 8 December 2025*



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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-09*