---
product_id: 9688088
title: "Grow!T Expanded Clay Pebbles, 4-16 mm, Brown, 40 L, Hydroponic Media | Reusable 100 percent natural clay media improves drainage and aeration in hydroponics, aquaponics, and container gardens"
brand: "hydrofarm"
price: "€ 413.31"
currency: EUR
in_stock: true
reviews_count: 13
category: "Hydrofarm"
url: https://www.desertcart.gr/products/9688088-grow-t-expanded-clay-pebbles-4-16-mm-brown-40
store_origin: GR
region: Greece
---

# Pre-washed for stable pH & dust-free 100% natural clay, pure & eco-friendly Superior aeration & drainage, roots breathe Grow!T Expanded Clay Pebbles, 4-16 mm, Brown, 40 L, Hydroponic Media | Reusable 100 percent natural clay media improves drainage and aeration in hydroponics, aquaponics, and container gardens

**Brand:** hydrofarm
**Price:** € 413.31
**Availability:** ✅ In Stock

## Summary

> 🌿 Elevate your grow game with nature’s breathable clay boost!

## Quick Answers

- **What is this?** Grow!T Expanded Clay Pebbles, 4-16 mm, Brown, 40 L, Hydroponic Media | Reusable 100 percent natural clay media improves drainage and aeration in hydroponics, aquaponics, and container gardens by hydrofarm
- **How much does it cost?** € 413.31 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/9688088-grow-t-expanded-clay-pebbles-4-16-mm-brown-40)

## Best For

- hydrofarm enthusiasts

## Why This Product

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

## Key Features

- • **Pure Natural Power:** Crafted from 100% natural clay for sustainable, chemical-free growth.
- • **Oxygen Boosted Roots:** Drain freely without waterlogging, maximizing oxygen flow for healthier plants.
- • **Stylish & Functional:** Enhances pot aesthetics while reducing evaporation and supporting beneficial bacteria.
- • **Ready-to-Use Clean Slate:** Pre-washed to ensure pH stability and eliminate dust—no extra prep needed.
- • **Versatile Hydroponic Hero:** Perfect for flood & drain, deep water culture, drip feed, and aquaponics systems.

## Overview

Grow!T Expanded Clay Pebbles are 40 liters of premium, 4-16 mm natural clay media designed for hydroponic and aquaponic systems. Pre-washed for pH stability and dust-free use, these pebbles provide excellent aeration and drainage, preventing root waterlogging while fostering beneficial bacteria growth. Ideal for flood and drain, deep water culture, and drip feed setups, they also serve as a decorative top layer that reduces evaporation. Durable, reusable, and eco-friendly, they’re a must-have for professional and hobbyist growers seeking healthier, more vibrant plants.

## Description

GROW!T horticultural clay pebbles are made from 100% natural clay. They are clean, pH stable, and offer great aeration and drainage in hydroponics, especially in flood and drain, deep water culture, and drip feed systems. Due to their unique structure and ability to cover a large surface area, they offer the ideal environment to foster beneficial bacterial growth around the root zone, leading to naturally healthier plants.GROW!T Clay Pebbles can be used for:•Aeration of growing media - ideal to mix into coco coir or soil to aid aeration •Drainage - will hold water as well as offering great aeration properties and free draining •Decoration - looks great as a top dressing for pots and also helps to prevent evaporation •Hydroponics/hydroculture - used widely in hydroponic growing, they are ideal for flood and drain, deep water culture and drip feed systems •Aquaponics - are also ideal to be used in aquaponic systems

Review: Hydroponic friendly - I've used these and ones like it for a little while now. I've got a hydroponic flood and drain system that's about 5 months old or so. They work as a fantastic base for most plants. They only seem to struggle with large heavier plants like tomatoes. Pictured is some parsley, lettuce, and the shoots you see between the lettuce is ginger we tossed in just to see how it would do.
Review: Clean them thoroughly, works well - I used this to act as a drainage medium for a reptile vivarium. A lot of people complained about the pieces not being perfect balls. For me, this didn't matter, especially since when I think of "pebbles," I tend to think of imperfect little pieces. The clay pebbles do vary in size, with a marginal amount being tiny enough to slip through a strainer. However, it is quite a large bag and I had plenty leftover. For my purpose, it works quite well. It helps to keep the humidity in the tank without leaving any standing water. I have yet to see any sort of mold or fungus growth. I am quite pleased! Hint for cleaning: I divided the bag into manageable amounts and used an old strainer to rinse them off with the hose until the water runs clear. This a longer process but helps to thoroughly rid yourself of all the dust. I originally tried just throwing everything into a large bin, filling with water, and pouring out the water but I still ended up with dusty water. Do yourself a favor and clean thoroughly the first time around.

## Features

- Extremely stable in both pH and EC
- Made from 100% natural clay
- Pre-washed to aid in stability
- Drain freely and do not hold any excess water, providing good oxygen levels around the root
- Will not float once fully wet

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00MHQ0IHA |
| Best Sellers Rank | #38,737 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #371 in Garden Soil |
| Brand | Hydrofarm |
| Brand Name | Hydrofarm |
| Customer Reviews | 4.6 out of 5 stars 4,725 Reviews |
| Global Trade Identification Number | 00638104013444 |
| Included Components | Clay Pebbles |
| Item Highlight | Reusable 100 percent natural clay media improves drainage and aeration in hydroponics, aquaponics, and container gardens Item Highlight Reusable 100 percent natural clay media improves drainage and aeration in hydroponics, aquaponics, and container gardens See more |
| Item Type Name | Clay Pebbles |
| Item Weight | 20 pounds |
| Manufacturer | PLANT!T |
| Manufacturer Part Number | GMC40L |
| Manufacturer Warranty Description | Warranty. |
| Model Number | GMC40L |
| Number of Packs | 1 |
| Style | Classic |
| Style Name | Classic |
| UPC | 638104013444 |
| Unit Count | 40 Count |
| Volume | 40 liters |

## Product Details

- **Brand:** Hydrofarm
- **Global Trade Identification Number:** 00638104013444
- **Item Weight:** 20 pounds
- **Style:** Classic
- **UPC:** 638104013444

## Images

![Grow!T Expanded Clay Pebbles, 4-16 mm, Brown, 40 L, Hydroponic Media | Reusable 100 percent natural clay media improves drainage and aeration in hydroponics, aquaponics, and container gardens - Image 1](https://m.media-amazon.com/images/I/61iKxhrtfyL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Hydroponic friendly
*by J***N on May 20, 2026*

I've used these and ones like it for a little while now. I've got a hydroponic flood and drain system that's about 5 months old or so. They work as a fantastic base for most plants. They only seem to struggle with large heavier plants like tomatoes. Pictured is some parsley, lettuce, and the shoots you see between the lettuce is ginger we tossed in just to see how it would do.

### ⭐⭐⭐⭐⭐ Clean them thoroughly, works well
*by L***I on July 24, 2017*

I used this to act as a drainage medium for a reptile vivarium. A lot of people complained about the pieces not being perfect balls. For me, this didn't matter, especially since when I think of "pebbles," I tend to think of imperfect little pieces. The clay pebbles do vary in size, with a marginal amount being tiny enough to slip through a strainer. However, it is quite a large bag and I had plenty leftover. For my purpose, it works quite well. It helps to keep the humidity in the tank without leaving any standing water. I have yet to see any sort of mold or fungus growth. I am quite pleased! Hint for cleaning: I divided the bag into manageable amounts and used an old strainer to rinse them off with the hose until the water runs clear. This a longer process but helps to thoroughly rid yourself of all the dust. I originally tried just throwing everything into a large bin, filling with water, and pouring out the water but I still ended up with dusty water. Do yourself a favor and clean thoroughly the first time around.

### ⭐⭐⭐⭐⭐ Worked great in my 55gal flood and drain system
*by J***N on August 4, 2018*

I bought these for my flood and drain set-up. You have to clean these very well as they have a lot of powder from production. As I was cleaning I was worried because they all floated. I made sure all of the water was out of my barrels and filled to the top with rock. I then flooded them and I was very happy because the weight of the pebbles where enough to keep from floating up and over the sides. There is also maybe an inch of dry rock at the top of my system to prevent the growth of alge. They are perfect for my halfbarrel flood and drain. Also if your interested took just about 6 to fill 2 half barrels. Its a lot of money but after digging out my $150 of rock that tested fine with vineger but then the ph started creeping up was not fun either. This pebble is so light and easy on the hands to work with and should withstand for so long I'm happy with the investment.

## Frequently Bought Together

- GROW!T GMC40l - 4mm-16mm Clay Pebbles, Brown, (40 Liter Bag) - Made from 100% Natural Clay, Can be used for Drainage, Decoration, Aquaponics, Hydroponics and Other Gardening Essentials
- General Hydroponics pH Control Kit For A Balanced Nutrient Solution

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-09-09*