GROW!T GMC10L - 4mm-16mm Clay Pebbles, Brown, (10 Liter Bag) - Made from 100% Natural Clay, Can be used for Drainage, Decoration, Aquaponics, Hydroponics and Other Gardening Essentials

If you require these, you already know what you need them for. The build quality is excellent. They are simple to setup and easy to use. They do an outstanding job of storing and transporting your water & nutrients. These are the golden standard of leca. Absolutely highly recommended.

arrived quick and item was perfect. thanks

Starting my semi-hydro plant journey and bought these. They're not like the perfect orange-y colored balls that you see some people using. These are a regular brown color and are more irregularly shaped, but that's fine for me because I had read it's actually easier to situate your plant in the irregular-shaped leca instead of the perfect balls. For the most part these haven't sunk after soaking them in water (even after soaking for weeks), but I don't think that really matters as far as actually using these for planting because none of the plants I've moved to leca have died and it's been a couple months now.

This growth medium is great for hydro-gardens. I have been using this product for about a year and this is not my first bag, I have ordered from Amazon and bought locally, no difference at all, cost & function are the same..My first thoughts were that the roots would get smashed with this medium in the Drip Method because it floats in water then sinks down when drained but that was not the case at all, in fact, my root systems were so healthy that they actually ate the medium up so do not expect to reuse for another crop, you will be lucky to find it within the massive root structure.Needless to say, the end result was amazing and I have never seen roots like that before... huge, pure white, and massive in length.. it was something you just don't see with a soil medium.End results were much healthier roots & stalk and a better tasting, yielding & healthier harvest. No disease or pests to battle since most originate or breed in soil. This is the way to go. 4 stars!*If this review helped you either way, could you please leave me a Helpful to let me know? Thanks!*

It worked enough for a second purchase. I washedf the crap pout of them and still dusty. So wash them....

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.

I normally buy leca in bulk but needed some ASAP so I ordered this bag. I didn't expect this bag to be huge but it is. I'd say there's 20 lbs of lecca in here at least! Definitely worth the $ I paid! Happy growing!

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.