---
product_id: 67504794
title: "ph buffer 7 300ml & ph buffer 4 300ml growth technology free 100ml formulex"
brand: "greenlight guys"
price: "$1308"
currency: MXN
in_stock: true
reviews_count: 8
category: "Greenlight Guys"
url: https://www.desertcart.mx/products/67504794-ph-buffer-7-300ml-and-ph-buffer-4-300ml-growth
store_origin: MX
region: Mexico
---

# Optimized for hydroponics & gardening Two-point calibration for precision Fixed pH values 4 & 7 ph buffer 7 300ml & ph buffer 4 300ml growth technology free 100ml formulex

**Brand:** greenlight guys
**Price:** $1308
**Availability:** ✅ In Stock

## Summary

> 🌿 Calibrate like a pro, grow like a legend!

## Quick Answers

- **What is this?** ph buffer 7 300ml & ph buffer 4 300ml growth technology free 100ml formulex by greenlight guys
- **How much does it cost?** $1308 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/67504794-ph-buffer-7-300ml-and-ph-buffer-4-300ml-growth)

## Best For

- greenlight guys enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Portable:** 300ml bottles with a bonus 100ml free, perfect for on-the-go calibration needs.
- • **Top-Rated & Proven:** 4.5-star rating from 183 users confirms consistent performance and value.
- • **Easy & Safe Calibration:** Simple pour-and-discard method prevents contamination, keeping your readings reliable.
- • **Precision You Can Trust:** Dual pH buffers (4 & 7) ensure your meter stays accurate for flawless plant care.
- • **Hydroponics & Greenhouse Ready:** Specifically formulated for professional growers and garden enthusiasts alike.

## Overview

Growth Technology pH Buffer Solutions (4 & 7) provide fixed, reliable calibration standards essential for maintaining accurate pH meter readings in hydroponics, gardening, and greenhouse environments. The two-point calibration method enhances precision, ensuring optimal plant health and growth. Packaged in convenient 300ml bottles with an additional 100ml free, these solutions are trusted by professionals and hobbyists alike for consistent, contamination-free use.

## Description

Growth Technology PH buffer 4 and 7 solutions are of a known and fixed PH, which are used to calibrate your PH meter and should be done on a regular basis to ensure ongoing accuracy from the meter. Pour out a small amount to use for calibration and remember to discard the used solution when finished, do not pour it back into the container as it will contaminate your new solution. First use PH buffer 7 solution to calibrate your meter to neutral, once this is done we recommend you then use PH buffer 4 to calibrate your meter to this level, this will give you a two point calibration and be far more reliable than just calibrating to one..

Review: Good product - Good item at a good price it does what it says on the bottle for my blulab ph pen
Review: Cheap an cheerful - Cheaper than others works well with Bluelab pen.

## Features

- Causes serious eye irritation.
- ph buffer
- HYDROPONICS
- GREENHOUSE
- GARDEN
- PLANTS

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00UC3E2F4 |
| Best Sellers Rank | 63,074 in Garden ( See Top 100 in Garden ) 209 in Hydroponic Nutrients & Additives 16,891 in Agricultural Equipment & Supplies |
| Cable feature | fixed |
| Compatible devices | PH Meters |
| Control method | Touch |
| Control type | Physical Button Control |
| Customer Reviews | 4.5 4.5 out of 5 stars (183) |
| Date First Available | 6 Mar. 2015 |
| Item model number | 4693138068415 |
| Item weight | 0.68 Kilograms |
| Manufacturer | GROWTH TECHNOLOGY |
| Material | Container |
| Material type | Container |
| Number of items | 1 |
| Package Dimensions | 15.7 x 12.7 x 5.5 cm; 680 g |
| Part number | Tranhuy |
| Specific uses for product | Calibration, Plant Care, Gardening, Hydroponics, Greenhouse |
| Style | Regular |
| Water resistance level | Waterproof |

## Product Details

- **Age range (description):** Adult
- **Brand:** GREENLIGHT GUYS
- **Colour:** BLACK
- **Connectivity technology:** Wired
- **Ear placement:** On Ear
- **Form factor:** On Ear
- **Headphone jack:** 3.5 mm Jack
- **Included components:** Container
- **Model name:** Ph Buffer Kit
- **Noise control:** None

## Images

![ph buffer 7 300ml & ph buffer 4 300ml growth technology free 100ml formulex - Image 1](https://m.media-amazon.com/images/I/81YOfAq4kvL.jpg)

## Questions & Answers

**Q: will this work with the bluelab ph pen?**
A: Don't see why not, ph buffer is ph buffer after all.

**Q: Is this product listing for both 'buffer 4' and 'buffer 7' - i.e. 2 x bottles of solution?**
A: Yes.

**Q: What is expiring date?**
A: There's nothing written on the bottles to state use by date.  I only started stocking these 2 weeks ago so I have only just acquired them direct from growth technology.

**Q: So I pour some of this in a glass and calibrate my pen - That's it, No distilled water required?**
A: Yes you are right. I usually use the cap itself.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good product
*by N***L on 17 February 2024*

Good item at a good price it does what it says on the bottle for my blulab ph pen

### ⭐⭐⭐⭐⭐ Cheap an cheerful
*by K***. on 10 January 2024*

Cheaper than others works well with Bluelab pen.

### ⭐⭐⭐⭐⭐ Sensible size bottles of buffer for a good price
*by S***N on 3 March 2023*

Regular calibration of any pH meter with accurate buffer solutions is esssential for getting accurate pH readings. These buffers are supplied in sensible black plastic bottles and the solutions have different colours (pH 7 is green, pH 4 is red) to avoid mix-ups. Much easier than dissolving up powders to prepare your own solutions.

## Frequently Bought Together

- ph buffer 7 300ml & ph buffer 4 300ml growth technology free 100ml formulex
- ph Probe Cleaning Solution 300ml & ph Probe Refill & Storage 300ml Growth Technology

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**Shop now:** [https://www.desertcart.mx/products/67504794-ph-buffer-7-300ml-and-ph-buffer-4-300ml-growth](https://www.desertcart.mx/products/67504794-ph-buffer-7-300ml-and-ph-buffer-4-300ml-growth)

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-03-17*