Aqua Natural Diamond Black 10lb, Premium Gravel and Substrate for Aquariums, Fish Tanks and terrariums, 1-2mm

Perfect consistency for Cory’s slight coarser than a true sand but close. Color is a true black with “sparkling “ crystal dispersed throughout. I did need to rinse before adding to aquarium but I did so about 3lbs at a time. And after only a few minutes was able to add to an existing aquarium by using a solo cup to transport it to the bottom and spread it out over my existing gravel with no noticeable change in water clarity. Yes a few stray grains floated around for a few hours but the water remained clear and I was never concerned about harm to the fish. In the end does what it’s supposed to do at reasonable price and looks good doing it

I ordered this to add a “sediment” layer for my aquatic plants, and to give a different landscape for my betta Tatsu. I rinsed and soaked them in a bucket overnight to get all the debris out and peace of mind that it’s clean; definitely helped with the cloudiness prior to adding. I added a thin layer across the pea gravel I already have; it was plenty of material for my 10 gallon tank. If used alone with no other substrate/rocks, you’d probably need 2 bags of this for a 10 gal. My pet peeves but doesn’t totally kill the vibe: 1. They don’t sparkle under water at all ☹️ 2. If you have a foam filter like mine that sits at the bottom, these quart rocks are as small as sand and my filter sucked them up and clogged it. I will be getting a top flow filter instead, so not too annoying. 3. I will update once I do a complete tank clean to share how difficult it is to clean with how small they are - by the looks of it, it’ll be a challenge. Wish they were larger size!

Very beautiful! My turtle tank i had completely cleaned the day before i got it. And since i didnt want to do another water change..i just turned off my filter and took my turtle out for an hour, and the water barely got cloudy afterwards and fully cleared back up in a couple hours. Very pleased!

The sand absolutely sparkles in light. It looks great in a fish tank. It’s currently sitting in a 10 gallon tank. When you first pour it in it does get the water a little cloudy but with any good filter it clears up very quickly. I absolutely recommend it for anyone.

To address other reviews: It does sparkle, but primarily when dry. It does say it is quartz gravel. However, when wet/underwater, it doesn't really sparkle much. It's not that dirty of gravel. If you ever buy natural gravel from any brand, it's always dirty and needs lots of rinsing, even when prewashed. Just being moved around, the gravel will grind away on itself and create dust. I'd say that I didn't have to wash this gravel nearly as much as the super cheap stuff at Petco, but i still rinsed about 3-4 times to get it to stop clouding water. It's also kind of in a space between gravel and course sand. It's one of those situations where we have to start debating the semantics of sand vs gravel before we can really call it one or the other. It's very fine gravel, or very course sand. It's mostly a bit smaller than the listing says, as i don't think that many of the pieces are actually around 2mm. There are some lighter-colored pieces in the mix. There aren't a ton of them, but enough that I could see fish confusing them for food or something. However, I doubt it's as big of a problem as people make it out to be. I personally like the black gravel with a small amount of lighter bits, as it makes it feel more natural and gives it more of a visual "texture". I can understand being disappointed if you want all jet-black gravel, but honestly I've never seen any gravel that was entirely black without it being artificially colored. I like this gravel because it's a good size for my pea puffer. It's not as problematic to work with as normal, finer sands, as very few pieces in the mix will float in the water column, even when being stirred/cleaned in a big bucket full of water. I find it attractive and easy to clean. My actual only complaint about it is that it's very pricey compared to many regular sands or gravels.

This is my favorite sand. Very fine black sand that glimmers! After rinsing briefly I had no issues with clouding. Looks amazing in the tank with large seiryu stone. Definitely more expensive than options like blasting sand etc, but worth it in my opinion.

There is nothing wrong with it, but please note: This is sand, not gravel

Be ready to rinse, and rinse….. and rinse and rinse. For my small tank it was fine but I’m moving to a bigger tank and bought the big bag and it has taken me all day to get the water to run clear split in two 5 gallon buckets. I’m also scared the sand will compact and cause issues for my planted set up because it’s extremely fine. I’m going to try mixing a little bigger grain with it and hope for the best. The photo is after my 12th rinse and when I pour the water it looks like lots of loose sparkles are appearing.

En mi caso fue una excelente opción para mi gambario, les recomiendo leer las instrucciones de uso para su correcto funcionamiento, ya que veo mucho comentarios negativos. Lo recomiendo ampliamente si su intención es tener gambas, platas o peces pequeños.

I really like it aesthetically as it blends with a lot of things, especially with water with tannins. It is also clean and easy to maintain than other substrates.

Not suitable for bottom dwellers. Extremely sharp, I even cut my hand while rinsing! Some pieces are long, thin. It’s also not even black - it’s about 50% green, with occasional earth-tone pieces. Wish I’d trusted the forums and steered away, but I was eager for a black sand-like substrate. I’ll go back to using enamel-coated silicon sand for now. All grains you see in the photos are from the bag I ordered. Photos taken outside in the shade (natural light). Would return but I left it too long. Might use for my shrimp instead, after more research.

Para una pecera no es nada adecuada... - La granulometria es mixta, viene con mucho polvo, y tmb granos correspondientes a grava fina y mediana-baja, que afecta en el sifonado del agua, se queda polvo en las paredes despues de los cambios de agua, a pesar de que la enjuague varias veces - da una apariencia de color cafe, y viene con muchos granos de color amarillo, no se muy bien q material sean - Lo bueno, no altera parametros A mi no me funciono para nada, 2 semanas despues....y voy a tener q retirar todo por completo, lo cual me deja con 4 k de grava para desechar

Normal black gravel. Does not sparkle