What is the amount per gallon mixing ratio?

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.

can you list ingredients with %. Thank you!

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.

ingredients? Concentration?

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

Is this safe for aquaponics systems?

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.

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General Hydroponics pH Down Liquid Fertilizer, 1-Quart

General Hydroponics pH Down Liquid Fertilizer, 1-Quart

Product ID: 76739056

Details

Brand
General
Global Trade Identification Number
Item form
Liquid
Item weight
1.18 kg
UPC
793094015325

📏Precise pH adjustment control

🧴Lightweight 1-quart liquid container

⚗️Food-grade phosphoric acid formula

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Description

🌿 Take control of your grow with precision pH power!

FOOD GRADE SAFETY - Formulated with premium phosphoric acid trusted by pros.
CONSISTENT STABILITY - Maintains steady pH levels to maximize nutrient uptake.
PRECISION P H MASTERY - Easily dial in optimal nutrient pH for peak plant performance.
LIGHTWEIGHT EASY HANDLING - 1-quart size designed for effortless measuring and application.
TRUSTED BY GROWERS WORLDWIDE - Proven reliability with 4.7-star rating from 6,000+ users.

General Hydroponics pH Down Liquid Fertilizer is a 1-quart acid solution using food-grade phosphoric acid to safely and effectively lower nutrient pH levels. Lightweight and easy to handle, it ensures consistent pH stability critical for optimal plant nutrient absorption. Trusted by thousands of growers, it delivers precise control to keep your hydroponic or soil grows thriving.

Specifications

ASIN	B00CJID1I4
Brand	General Hydroponics
Brand Name	General Hydroponics
Customer Reviews	4.8 out of 5 stars 6,491 Reviews
Global Trade Identification Number	00793094015325
Item Form	Liquid
Item Weight	1.18 kg
Item form	Liquid
Item weight	1.18 kg
Manufacturer	General Hydroponics
Manufacturer Part Number	HGC722120
Model Number	HGC722120
Number of Items	1
Number of items	1
UPC	793094015325
Unit Count	1.0 count

Reviews

S**N

Hydroponics must have!

2.04.2024

T**E

If this isn’t working for you, you have another problem…

24.06.2022

く**び

良い

4.05.2026

R**R

Works as described.

21.03.2026

竹**亮

流石です。

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。

11.04.2026

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