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 4,698 reviews
Condition: New
Checking for product changes
$49.80 Why this price?
Holiday Deal · 27% off was $67.98

Buy Now, Pay Later

As low as $8.30 / 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 Wednesday, Dec 25
Order within 3 hours and 13 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


Reclining Position Count: 1


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: Wednesday, Dec 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
    • Good product. Quite a bit more dirt on them then what I've gotten in smaller quantities.
Size: 40 Liter Bag Pattern Name: Bag
Product is good, weights were on point. I had to work a bit harder washing them clean. Other than that, the product works as it should.
Reviewed in the United States on September 16, 2024 by s.schultz
    • 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
    • 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.
    • 10 liters is quite a bit - good pebbles
Size: 10 liter Pattern Name: Bag
Review Image by Shannyn Shannyn
Review Image by Shannyn Shannyn
Review Image by Shannyn Shannyn
Review Image by Shannyn Shannyn
Review Image by Shannyn Shannyn
If you are looking for perfectly round pebbles, like on the photo on the bag, look elsewhere. I read the reviews, so I was aware of what I was getting. Most of the pebbles were irregular shaped and looked like odd lava rock, but that does not affect my hydroponics system. I use a combination of hydroton in the bottom of each tier of the system and then in the grow baskets surrounding my roots. I used to grow directly in the tiers, in perlite, but I have always enjoyed hydroton, and this way I also have more control over the root system so that it does not clog my system. I just ordered a 40 ltr bag because 10 ltrs was only enough to make a short foundation in each of the tiers of one system. Since I completely switched over from Perlite this year, I need a lot. I soaked first (see picture of pebbles in the pink tub) and then I drained and strained. Towards the bottom, I strained and rinsed again in the strainer. A lot of mud and residue comes off of these, so be sure to soak and rinse before adding it to your systems. Obviously, I will check pH once I get everything set up for the plants, as I know that having this much hydroton will likely change the water balance, but that is okay. I also used this same brand in an aquaponics system, and I grew strawberries, mint and chamomile successfully. The hydroton did not bother the fish. ... show more
Reviewed in the United States on May 6, 2017 by Shannyn Shannyn
    • 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.