Search  for anything...
Hydrofarm

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

    • Based on 4,692 reviews
Condition: New
Checking for product changes
$48.91 Why this price?
Save $19.07 was $67.98

Buy Now, Pay Later

As low as $8.15 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2025

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Esbenshades Garden Center
Arrives Monday, Nov 25
Order within 23 hours and 53 minutes
Available payment plans shown during checkout

Size: 40 Liter Bag


Pattern Name: Bag


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

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

Brand: Hydrofarm


Color: Brown


Product Dimensions: 25"D x 5"W x 18"H


Size: 40 Liter Bag


Special Feature: Drains freely


Brand: Hydrofarm


Color: Brown


Product Dimensions: 25"D x 5"W x 18"H


Size: 40 Liter Bag


Special Feature: Drains freely


Product Care Instructions: Hand Wash


Unit Count: 40.0 Count


Recommended Uses For Product: Gardening


Style: Classic


Pattern: Bag


Room Type: Patio Garden


Age Range (Description): Adult


Included Components: Clay Pebbles


Theme: Gardening


Shape: Rectangular


Model Name: GROW!T GMC40l Clay Pebbles, 4mm-16mm, 40 Liters


Arm Style: Armless


Surface Recommendation: Hard Floor


Furniture base movement: Glide


Indoor/Outdoor Usage: Indoor


Fill Material: 100% natural clay pebbles


Tilting: No


Is Customizable: No


Is Electric: No


Is Foldable: No


UPC: 638104013444


Global Trade Identification Number: 44


Form Factor: Clay Pebbles


Manufacturer: PLANT!T


Item Weight: 20 pounds


Item model number: GMC40L


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Nov 25

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Hydroponics/aquaponics pepples
Size: 40 Liter Bag Pattern Name: Bag
I have now used this product for a few years w/o a break. They don’t break down, so repeated use means you do get your money’s worth. Others have seen them i. My tank and are i. Awe and likewise follow suit, which is how I came to buy them. A neighbor had the same tank, used the same priduct, and referred me to Amazon. ... show more
Reviewed in the United States on July 5, 2024 by Carla M. Campbell
    • Best bang for your buck
Size: 40 Liter Bag Pattern Name: Bag
The 40L bag seems to be the best offering as far as clay stones for hydro go. These are a little rougher, and to some uglier, than hydroton. I find washing these out is a little better than dealing with hydroton. During transport you'll get some sand generation as a result of the stones rubbing against one another, but that quickly washes out. Sizes are a bit more random, ranging from very small to very large. Post-hydro they work well to aerate soils as well, albeit they are a bit large. ... show more
Reviewed in the United States on December 31, 2023 by N
    • My favorite LECA
Size: 25 Liter Bag Pattern Name: Bag
I bought this LECA because it was the cheapest I could find for the quantity. As others have mentioned, most of it is not round. If aesthetics are concerning for you, this LECA isn’t for you. I actually think all the variation makes the LECA fit together nicer, and I actually get better results with it. Yes roots stick to it, but roots stick to the round ones too. Yes it’s a little dusty when you get it, but what LECA won’t be? They all rub on each other during shipping. Just rinse it and it’s completely fine. No they do not sink. I don’t know what makes these different than others, but they definitely always float. It doesn’t really bother me, so that’s not a concern. Having said all of that, I’m very happy with it for what it is! It works great and the price is right! ... show more
Reviewed in the United States on June 19, 2020 by Review2Me
    • Filled 50 4" inch net cups with plenty leftover
Size: 40 Liter Bag Pattern Name: Bag
Review Image by Melissa Patrick Melissa Patrick
Review Image by Melissa Patrick Melissa Patrick
The bag weighed 28lbs on arrival. I filled 50, 4" inch net cups and still have 8 pounds leftover. I was worried there wouldn't be enough but it is plenty for my hydroponic vegetable garden. As far as the quality of the 'pebbles' they seem to be average. For those that are looking for a perfectly uniform round ball appearance, don't get this product. A random sample taken from the bag consists of various shapes, perfectly round being the most rare shape. There are quite a few fragmented and broken pieces mixed through out. As for me, I wasn't concerned at all with looks, only usability, and these seem to work just fine at holding water and creating space for oxygen. I tested their claim of being pH inert and found it to be true. These pebbles did not appear to change the pH of my water. They are gritty however and will need to be washed before use. Overall, happy with the price for the amount and would buy again. update- I soaked the pebbles for 24 hours and they still float on the surface of the water. 24 hours should have been more than sufficient for them to be "fully wet" as the description says. For anyone that needs these to sink to the bottom of water do not get these, they will float. They will work for the purpose of a net cup being about 2/3 submerged in water. Try and submerge the cup in water any deeper and the pebbles will push up out of it. I am still happy with them because I don't need them to be be submerged, only half under the water at most. ... show more
Reviewed in the United States on May 12, 2015 by Melissa Patrick Melissa Patrick
    • Essential for potted plants!
Size: 40 Liter Bag Pattern Name: Bag
These clay balls are perfect for keeping fungus gnats away from plants
Reviewed in the United States on July 31, 2024 by Amelia H.
    • Amazing
Size: 40 Liter Bag Pattern Name: Bag
Love this laca pebbles. This is a really big bag and amazon had it cheaper than my local store. For indoor plants I recommend to soak them up in boiling water as others mentioned that some flies were coming out so wanted to stay protected and kill all the bugs/bacteria’s although didn’t noticed any just as a precaution ... show more
Reviewed in the United States on May 20, 2024 by Liam
    • Clean them thoroughly, works well
Size: 10 liter Pattern Name: Bag
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. ... show more
Reviewed in the United States on July 24, 2017 by Lori
    • Bad Quality
Size: 40 Liter Bag Pattern Name: Bag
I built an aquaponics system for my daughter and filled the grow bed with two bags of this media. The media was extremely dirty and ended up clogging my laundry sink. I’ve never had anything clog my laundry sink before but the excess clay dust from this media did it. Despite soaking the pieces for a week, they still float. Most of the pieces are broken and there are a lot of really small pieces, the size of gravel that can wash down into the fish tank and cause issues with your pump. After figuring out that they don’t stay in place and float, I ended up getting pond rock from Lowes and using that to fill up half of the grow bed. I then used 1 bag of this media to complete the grow bed. This was a lot cheaper and worked a lot better. If I had to guess, I believe this is seconds or perhaps defects that are sold as firsts and for the price, that makes sense. I found much better media from another vendor. The biggest difference is the legit clay sounds like rice crispy cereal when they get wet from all the pores soaking up water. These definitely do not do this. They are more like lava rock or something weird. ... show more
Reviewed in the United States on January 30, 2022 by Gotta_Clue

Can't find a product?

Find it on Amazon first, then paste the link below.