---
product_id: 520693888
title: "Humboldts Secret pH Down for Plants | Liquid pH Adjuster and Balancer for Soil Coco Hydroponics | Concentrated Phosphoric Acid Solution Supporting Nutrient Uptake and Strong Growth | 1 Gallon"
brand: "humboldts secret"
price: "VT43386"
currency: VUV
in_stock: true
url: https://www.desertcart.vu/products/520693888-humboldts-secret-ph-down-for-plants-liquid-ph-adjuster-balancer
store_origin: VU
region: Vanuatu
---

# Universal grow medium compatibility Highly concentrated formula Precise pH control Humboldts Secret pH Down for Plants | Liquid pH Adjuster and Balancer for Soil Coco Hydroponics | Concentrated Phosphoric Acid Solution Supporting Nutrient Uptake and Strong Growth | 1 Gallon

**Brand:** humboldts secret
**Price:** VT43386
**Availability:** ✅ In Stock

## Summary

> 🌿 Master your grow with precision pH control!

## Quick Answers

- **What is this?** Humboldts Secret pH Down for Plants | Liquid pH Adjuster and Balancer for Soil Coco Hydroponics | Concentrated Phosphoric Acid Solution Supporting Nutrient Uptake and Strong Growth | 1 Gallon by humboldts secret
- **How much does it cost?** VT43386 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/520693888-humboldts-secret-ph-down-for-plants-liquid-ph-adjuster-balancer)

## Best For

- humboldts secret enthusiasts

## Why This Product

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

## Key Features

- • **Concentrated Power:** Up to 25% stronger than competitors, requiring less product per use
- • **Stress-Free Growth:** Prevents nutrient lockout and deficiencies for healthier plants
- • **Versatile Application:** Perfect for soil, coco, hydroponics, DWC, NFT, and more
- • **Trusted Grower Formula:** Made in California with pure phosphoric acid, no additives or dyes
- • **Optimize Nutrient Uptake:** Balances pH between 5.5-6.5 for maximum absorption and vibrant growth

## Overview

Humboldts Secret pH Down is a professional-grade, highly concentrated phosphoric acid solution designed to quickly and effectively lower pH in various grow mediums including soil, coco, and hydroponics. By maintaining an optimal pH range of 5.5 to 6.5, it maximizes nutrient uptake, prevents deficiencies, and supports strong root development and abundant harvests. Trusted by growers and made in California, this formula is up to 25% stronger than competitors, ensuring efficient use and consistent, vibrant plant growth.

## Description

Full description not available

## Features

- Balance Your Grow Medium Fast: Our Humboldts Secret pH Down quickly and effectively lower pH in soil or coco to the optimal range for nutrient absorption. Prevents deficiencies and keeps plants stress-free while creating the right foundation for strong roots lush foliage and abundant harvests.
- Fuel Stronger Healthier Growth: Maintain precise plant pH balance between 5.5 and 6.5 to prevent nutrient lockout and maximize vitality. Works for vegetables flowers and herbs in any medium helping your garden thrive from seedling to full production with consistent vibrant growth.
- Highly Concentrated and Efficient: Just a small amount of our hydroponic pH down makes powerful lasting adjustments saving you time and money. Up to 25% stronger than some competitors this commercial grade formula ensures reliable results with minimal product use.
- Versatile for All Growing Methods: Use Humboldts Secret pH Down in soil hydroponic systems like DWC and NFT coco coir or other grow mediums. Works seamlessly with your nutrient solution to support balanced feeding healthy stems and increased yields year round.
- Expert Made Quality You Can Trust: Designed by growers for growers our concentrated pH down for plants uses high grade phosphoric acid and contains no dyes or additives. Proudly manufactured in California it delivers professional level results for every type of garden.

## Product Details

- **Brand:** Humboldts Secret
- **Item Form:** Liquid
- **Liquid Volume:** 128 Fluid Ounces
- **Specific Uses For Product:** Hydroponics
- **Manufacturer:** HS Supplies, LLC

## Images

![Humboldts Secret pH Down for Plants | Liquid pH Adjuster and Balancer for Soil Coco Hydroponics | Concentrated Phosphoric Acid Solution Supporting Nutrient Uptake and Strong Growth | 1 Gallon - Image 1](https://m.media-amazon.com/images/I/61iiEERvftL.jpg)
![Humboldts Secret pH Down for Plants | Liquid pH Adjuster and Balancer for Soil Coco Hydroponics | Concentrated Phosphoric Acid Solution Supporting Nutrient Uptake and Strong Growth | 1 Gallon - Image 2](https://m.media-amazon.com/images/I/81PiEX3i0ZL.jpg)
![Humboldts Secret pH Down for Plants | Liquid pH Adjuster and Balancer for Soil Coco Hydroponics | Concentrated Phosphoric Acid Solution Supporting Nutrient Uptake and Strong Growth | 1 Gallon - Image 3](https://m.media-amazon.com/images/I/81gnA1p7InL.jpg)
![Humboldts Secret pH Down for Plants | Liquid pH Adjuster and Balancer for Soil Coco Hydroponics | Concentrated Phosphoric Acid Solution Supporting Nutrient Uptake and Strong Growth | 1 Gallon - Image 4](https://m.media-amazon.com/images/I/91a84Y8NbgL.jpg)
![Humboldts Secret pH Down for Plants | Liquid pH Adjuster and Balancer for Soil Coco Hydroponics | Concentrated Phosphoric Acid Solution Supporting Nutrient Uptake and Strong Growth | 1 Gallon - Image 5](https://m.media-amazon.com/images/I/8164huqxEoL.jpg)

## Available Options

This product comes in different **Size** options.

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-25*