---
product_id: 731948562
title: "General Hydroponics GH pH Down Paper Down 32oz"
brand: "general hydroponics"
price: "$113.43"
currency: USD
in_stock: true
reviews_count: 8
category: "General Hydroponics"
url: https://www.desertcart.us/products/731948562-general-hydroponics-gh-ph-down-paper-down-32oz
store_origin: US
region: United States of America
---

# Versatile for soil & hydroponics 946 ml precision liquid Highly concentrated formula General Hydroponics GH pH Down Paper Down 32oz

**Brand:** general hydroponics
**Price:** $113.43
**Availability:** ✅ In Stock

## Summary

> 🌿 Master your grow with precision pH tuning!

## Quick Answers

- **What is this?** General Hydroponics GH pH Down Paper Down 32oz by general hydroponics
- **How much does it cost?** $113.43 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/731948562-general-hydroponics-gh-ph-down-paper-down-32oz)

## 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

- • **Safety First:** Clear usage guidelines and safety precautions to protect you and your plants.
- • **Trusted Quality:** From General Hydroponics, a brand with 4.7-star rating and global recognition.
- • **Concentrated Formula:** A little goes a long way—946 ml bottle ensures long-lasting use and value.
- • **Precision pH Control:** Easily adjust your nutrient solution with just a few drops for optimal plant health.
- • **Versatile Application:** Perfectly compatible with soil cultivation, hydroponics, and organic growing systems.

## Overview

General Hydroponics GH pH Down is a highly concentrated liquid solution designed to lower pH levels in soil, hydroponic, and organic growing systems. Packaged in a generous 946 ml bottle, it offers precise control for healthier plants and optimized nutrient uptake. Trusted by thousands with a 4.7-star rating, it’s a must-have for serious growers aiming for perfect pH balance.

## Description

[Precautions] Keep out of reach of children. Please handle with caution as it will burn if you touch it directly. Try to wear gloves or glasses. If you get it or see it, rinse it off under running water immediately. If swallowed, please go to the hospital and take care. User is responsible for proper use, storage, and disposal.

Review: 少しで、めちゃくちゃ下がりますよ。気をつけて使用して下さい。
Review: Phの調整に最適ですが、結果が出るまで時間がかかります。 添加後、最低30分ぐらいしてからPhを測らないと正確ではありません。 添加してもあまり変わらないと思って、さらに添加すると30分後大変なことになります。 1ml量れるスポイトがオススメ。

## Features

- GENERAL HYDROPONICS GH pH Down prayer down 3.0 fl oz (946 ml)
- Liquid type pH down agent
- If the pH value of the potting liquid is too high, please mix small amounts at a time
- Effective for soil cultivation, nutrients, hydroponics, and organic hydroponics

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00CJID1I4 |
| Amazon Bestseller | #40,975 in DIY, Tools & Garden ( See Top 100 in DIY, Tools & Garden ) #400 in Garden Fertilizers |
| Brand Name | General Hydroponics |
| Customer Reviews | 4.7 4.7 out of 5 stars (6,474) |
| Global Trade Identification Number | 00793094015325 |
| Item Form | Liquid |
| Item Weight | 1.18 kg |
| Manufacturer | General Hydroponics |
| Manufacturer Part Number | HGC722120 |
| Model Number | HGC722120 |
| UPC | 793094015325 |
| Unit Count | 946.0 Milliliters |

## Product Details

- **Brand:** General Hydroponics
- **Global Trade Identification Number:** 00793094015325
- **Item Form:** Liquid
- **Item Weight:** 1.18 kg
- **UPC:** 793094015325

## Images

![General Hydroponics GH pH Down Paper Down 32oz - Image 1](https://m.media-amazon.com/images/I/71wWztjceeL.jpg)
![General Hydroponics GH pH Down Paper Down 32oz - Image 2](https://m.media-amazon.com/images/I/710jFIH3bSL.jpg)
![General Hydroponics GH pH Down Paper Down 32oz - Image 3](https://m.media-amazon.com/images/I/71W8CoPvNWL.jpg)
![General Hydroponics GH pH Down Paper Down 32oz - Image 4](https://m.media-amazon.com/images/I/31sdMHDuyGL.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

### ⭐⭐⭐⭐⭐ Review
*by 竹***亮 on April 11, 2026*

少しで、めちゃくちゃ下がりますよ。気をつけて使用して下さい。

### ⭐⭐⭐⭐ Review
*by S***I on June 14, 2025*

Phの調整に最適ですが、結果が出るまで時間がかかります。 添加後、最低30分ぐらいしてからPhを測らないと正確ではありません。 添加してもあまり変わらないと思って、さらに添加すると30分後大変なことになります。 1ml量れるスポイトがオススメ。

### ⭐⭐⭐⭐ Review
*by D***N on March 3, 2024*

ph調整剤です。 愛用品です。

## Frequently Bought Together

- General Hydroponics pH Down Liquid Premium Buffering For pH Stability, Quart
- General Hydroponics CALiMAGic 1-0-0, Concentrated Blend of Calcium & Magnesium, Secondary Nutrient Deficiencies Helps Prevent Blossom End Rot & Tip Burn, Clean, Soluble, 1-Quart
- VIVOSUN Digital pH and TDS Meter Kits, 0.01pH High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Pool and Aquarium, Yellow Blue, UL Certified

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-04-27*