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

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!

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.

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.

Ok, while soon many questions regarding this product have surfaced, and there is conflicting data, I have done research. I have DONE SERIOUS NUMBER CRUNCHING FOR EVERYONE, NOT BIASED AND NOT A PAID ENDIRSMENT.While this product will not be suitable for aeroponic use, as it floats more than sinks... It will displace water and will not alter ph.A 40 liter bag is 1.4 cubic feet- the bag will come to. Just about your knees and is about a foot wide. (See photos)Upon rinsing and reweighing after days of dying, I found that 14.3 ounces were lost. Upon a second testing on another bag- twice that was lost, so a great variance is seen upon batches. This product is often hated as of "... So much orange water and rust left behind" after initial rinsing and being held in a 5 liter, 10 liter and 20 liter containers filled 3/4 respectively and equivalent quantity of tap water with a ph of 6.8, with rather high levels of phosphate, though no ammonia, nitrates, nitrites, nor more than a slight reading of chlorine, left for 1 month the following was found: the 5 liter container retained NO discoloration and .7 ounces of "rust" whereas the larger containers in fact, oddly- all results were found after repeated twice, left no orange water and almost no rust. So, the less you use- the more is left behind. This may be due to several reasons.Of which comes down to NOTE:-results are being sent to chemists, an organic biologist and numerous PhDs and waiting to revise with findings on this and a couple other oddities which require determinations from colleagues-In summation, this is a fantastic all around medium which is inexpensive, versatile, and when mixed with a few bags- consistency (obviously) becomes less of a con. I have used other products, I have used every other product available to the public. Findings: while other products may be superior- until their prices come down, expanded clay will be the continued choice for DWC, Gravity fed Dripers, and more advanced timer based drip systems, among other systems including a cheap GREAT way to ensure your soil is constantly well drained and consistently consistent. Any further questions? PLEASE ASK, I have MORE data to come! Thanks for your interest, and time.

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.

Even though I never really used it in my aquaponics system, I would still recommend it, because it's lightweight and it provides the roots of the plants and vegetables plently of oxygen.