---
product_id: 100665895
title: "General Hydroponics pH Down Liquid Fertilizer, 1-Gallon"
brand: "general hydroponics"
price: "¥4136"
currency: JPY
in_stock: false
reviews_count: 5
url: https://www.desertcart.jp/products/100665895-general-hydroponics-ph-down-liquid-fertilizer-1-gallon
store_origin: JP
region: Japan
---

# General Hydroponics pH Down Liquid Fertilizer, 1-Gallon

**Brand:** general hydroponics
**Price:** ¥4136
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** General Hydroponics pH Down Liquid Fertilizer, 1-Gallon by general hydroponics
- **How much does it cost?** ¥4136 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/100665895-general-hydroponics-ph-down-liquid-fertilizer-1-gallon)

## 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

## Description

Review: Great Value & Reliability
Review: Works with plants

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000FG0F9U |
| Brand | General Hydroponics |
| Customer Reviews | 4.7 out of 5 stars 3,301 Reviews |
| Global Trade Identification Number | 00793094015332 |
| Item Form | Liquid |
| Item Weight | 907 g |
| Net Quantity | 3785.41 Milliliters |
| UPC | 714863970218 793094015332 |
| Unit Count | 3785.41 Milliliters |

## Product Details

- **Brand:** General Hydroponics
- **Global Trade Identification Number:** 00793094015332
- **Item Form:** Liquid
- **Item Weight:** 2 Pounds
- **UPC:** 714863970218 793094015332

## Images

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



### ⭐⭐⭐⭐⭐ Works with plants
*by P***T on 17 February 2026*



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



## Frequently Bought Together

- General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon
- General Hydroponics CALiMAGic 1-0-0, Concentrated Blend Of Calcium & Magnesium, Secondary Nutrient Deficiencies Helps Prevent Blossom End Rot & Tip Burn, Clean, Soluble, 1-Gallon
- General Hydroponics FloraBloom 0-5-4, Use With FloraMicro & FloraGro For A Tailor-Made Nutrient Mix, Provides Nutrients For Reproductive Growth, Ideal For Hydroponics, 1-Gallon

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-08*