---
product_id: 67504794
title: "ph buffer 7 300ml & ph buffer 4 300ml growth technology free 100ml formulex"
brand: "greenlight guys"
price: "$88.32"
currency: USD
in_stock: true
reviews_count: 8
category: "Greenlight Guys"
url: https://www.desertcart.ec/products/67504794-ph-buffer-7-300ml-and-ph-buffer-4-300ml-growth
store_origin: EC
region: Ecuador
---

# Optimized for hydroponics & gardening Dual-point buffer system Precise pH calibration ph buffer 7 300ml & ph buffer 4 300ml growth technology free 100ml formulex

**Brand:** greenlight guys
**Price:** $88.32
**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?** $88.32 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/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

- • **Trusted by Experts:** Highly rated with 4.5 stars and compatible with top pH meters like Bluelab, ensuring professional-grade performance.
- • **Lightweight & Portable:** At just 0.68 kg, this kit is easy to handle and perfect for on-the-go calibration in any growing environment.
- • **Contamination-Free Usage:** Designed for single-use aliquots to maintain solution purity and extend the lifespan of your calibration fluids.
- • **Dual-Point Calibration Mastery:** Ensure unmatched accuracy by calibrating your pH meter at both neutral (7) and acidic (4) points for reliable readings every time.
- • **Hydroponics & Greenhouse Ready:** Specifically formulated to support your advanced plant care, making it a must-have for hydroponic and greenhouse professionals.

## Overview

The Growth Technology pH Buffer Kit includes 300ml each of pH 4 and pH 7 calibration solutions, designed for precise two-point calibration of pH meters. Ideal for hydroponics, greenhouse, and garden plant care, it ensures accurate, contamination-free calibration to maintain optimal growing conditions. Lightweight and compatible with popular pH meters, this kit is a trusted choice for professionals seeking reliable and consistent pH measurement.

## 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 |
| Age Range Description | Adult |
| Best Sellers Rank | 39,670 in Garden ( See Top 100 in Garden ) 109 in Hydroponic Nutrients & Additives 10,381 in Agricultural Equipment & Supplies |
| Box Contents | Container |
| Brand Name | GREENLIGHT GUYS |
| Cable Features | fixed |
| Colour | BLACK |
| Compatible Devices | PH Meters |
| Control Method | Touch |
| Control Type | Physical Button Control |
| Customer Reviews | 4.5 4.5 out of 5 stars (183) |
| Earpiece Shape | On Ear |
| Enclosure Material | Container |
| Frequency Range | 20 Hz - 20,000 Hz |
| Headphone Form Factor | On Ear |
| Headphone Jack | 3.5 mm Jack |
| Headphones Ear Placement | On Ear |
| Item Weight | 0.68 Kilograms |
| Manufacturer | GROWTH TECHNOLOGY |
| Model Name | Ph Buffer Kit |
| Model Number | 4693138068415 |
| Network Connectivity Technology | Wired |
| Noise Control | None |
| Number of Items | 1 |
| Product Features | Lightweight |
| Specific Uses For Product | Calibration, Plant Care, Gardening, Hydroponics, Greenhouse |
| Style Name | Regular |
| Unit Count | 1.0 count |
| 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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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-04-01*