Onyx Sand, 7 kg / 15.4 lbs

Did this take some time to clean? Yes. However after rinsing thoroughly I was able to add it into my tank and it didn’t even get cloudy at all. I also mixed in some white play sand after cleaning it very well and it actually helped to soften the consistency of the sand and it allowed me to get more for my money that way. Looks great and so far I love it!

Do NOT underestimate how dirty this is! I ultimately had to hand wash it in the bath tub for 2 hours straight and it still clouded my fish tank. It also left behind dark residue in the tub so be careful when you clean it. I really love the color and how it looks. It's perfect to supplement the sand bed I already use for my plants and my Cory catfish don't mind it. It's not too fine but not course enough to hurt them so I'm happy with it. For 15lbs at $11 it's the best deal for sand. Just be careful.

I think it looks really good so far even though it’s not as dark as I’d anticipated it to be. But please listen to the other reviews and wash the stuff before you put it in.

First off, Seachem is my go to company for tank chemicals. Just go to their website and you will see why. So, I went to them for my substrate.This substrate will help maintain a higher pH, which your cichlids’ need. Don’t just pick any substrate. At least, pick one that raises pH even if you need to buy a cheaper one.Doesn’t cloud the tank. Dump the substrate into a bucket. Make sure the bucket doesn’t have residual cleaning chemicals. Fill with hose, and dump water about 5 to 6 times. Leaving the hose in and allowing the water to overflow didn’t work for me.Dump the substrate in your tank. When filling your tank with water put a bowl under the hose. See photo. Keep in mind there was no background on my tank. It wasn’t cloudy; that’s just the gray/blue wall you see behind the tank. If you do experience cloudiness, your filter should handle it but you may need to add a charcoal or finishing pad to clear it up.Lastly, you can add plants. Cichlids love to eat plant - add least the herbivores, but they don’t like the taste of Anubias barteri or Java fern. To be honest though, you shouldn’t bury their roots in the substrate anyway because they can rot. Instead, use tank safe glue to fasten the roots to drift wood, shells, rocks, etc.You guessed it I recommend Seachem and I am in no way compensated for my opinion.

The sand is very fine which apparently is good for plant roots (??). HOWEVER, you will spend HOURS sifting this again and again and again to remove the fine dust that accumulates during shipping! If you don't, VERY cloudy aquarium (almost as bad as London fog, lol)...Once you do get it into an EMPTY aquarium, and plant the live plant roots into it, you then have to VERY carefully pour the water onto a dish that you place on top of the sand (one cup at a time!) to avoid clouding the tank again. I like the appearance, BUT is it worth all the hassle? NO!!! EVERY time you do a water change, it clouds up the whole tank and takes about 48 hours to fully settle (on a 10 gallon long tank), by which time if you have any live plants with larger leaves, they are totally covered with grey dust!A waste of money and I am now going to have to strip the entire tank down, clean it out totally and use a different substrate and start all over again! Glad I hadn't put any fish in it yet!

I read all of the reviews on this sand before I purchased it. I thought, surely I am capable of rinsing it well, and dark gray will look nice in my new tank.Wrong.First, it is a very light, ashy gray. That's a matter of preference, but I truly have no idea why they named it "black." On the gray spectrum, it's closer to white than black.I rinsed it REPEATEDLY. Over and over and over again. Carefully filled my tank. Gave it several days for the dust to settle again. But any time I did ANYTHING in the tank - add a new plant, carefully vacuum the bottom, move a decoration - there were the clouds of dust again. It would settle - everywhere. Every decoration, every plant, every glass wall was coated in gray dust. The only way to get it off the plants was to hand massage each leaf after all the dust had settled.Most importantly, it wasn't good for my fish. All of their poops were the same color as the sand, which made sense since they were swimming around in its dust. My two zebra loaches swam around like maniacs, never resting, and I finally noticed their bellies had turned red!After two months, I decided to bite the bullet and switch it out. It took me several days to remove it all, because the water would get so cloudy I couldn't see what I was doing or whether I was about to murder a fish. (And yes, I was being careful).I went with Imagitarium Black Sand, and I love it. It's not all-natural; people have recommended beach sand and other similar products if all-natural is important to you. But it was dust free when I rinsed it, went in easily, doesn't stir up dust when I move it. It's holding my plants well. And most importantly, my fish's poop is now the color it is in my other tank, and my loaches, while still very active, spend time resting and digging around on the bottom of the tank, as loaches do.I suppose there might be circumstances where someone would love this sand enough to put up with the dust. Otherwise, I think there are better choices. And I would absolutely not use it if you plan to have any kind of sensitive bottom dwellers - loaches, cory cats, etc.

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Le gravier est top, esthétiquement un peu plus clair que ce que j'imaginais. Son poids est bon et permet le nettoyage du substrat sans aspirer tous les graviers contrairement au manado. Son seul défaut est son nettoyage, c'est un substrat très très poussiéreux, une véritable galère à rincer.

This is the second aquarium I have used this substrate with. I have a mixture of Seachem Onyx Sand and Grey Coast (supposedly they are the same - just marketed for fresh vs salt). After buying a bag of each I can confirm that this is true.The substrate is a nice mix of coarse gravel with small and tiny pieces. The biggest thing to make sure that you do is to wash it. It produces a lot of dust that does not settle and will stay suspended in the water for ever. Give it a good rinse and you will love this substrate / gravel. If you do not rinse it - you will spend weeks doing gravel vacuums regretting ever using this.Plants love it and my trumpet snails love digging in it. Rabbit snails do have a harder time moving around on the smaller gravel though.You do lose a good amount of the bag through washing - maybe a quarter (25%) will go down the drain as you wash it - so if you think you need 2 bags buy 3. Best way is in a bucket with a hose or in a cup and your hand mixing slowly - most pieces will go through a strainer.

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Good value and really helps make a natural looking tank (I mixed it with a light coloured sand and just a small amount of gravel). Needs a really good rinse, but that's to be expected