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

Highly recommend
My fish absolutely love it!!! They love to rub their bellies in the sand!!! Makes my tank pop with color!!! So easy to clean too!! Highly recommend!!!

Sparkles when dry, not too dirty, does have some lighter rocks in it, but is pretty good regardless
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.

Beautiful substrate but it’s not gravel.
Beautiful, but not exactly gravel or sand. Kind of in-between which works fine for my use. 1 bag took care of my 10g tank.Another note, if you are looking for completely black, this is not it. There are bits of brownish pieces in the mix (pictured).Lastly, I will say that even though people have said they didn’t rinse before adding to the tank I did and I’m so glad I took the time. During rinses the water was real gray/black and had tons of floaters. I rinsed, skimmed, and drained it till the water was “clearish” which was about 3x. Now it’s in the tank and the water is almost as clear as usual.Great product.

Not for snails! 🐌
I bought this because I wanted to give my snails a soft fine substrate. I put it in my tank after rinsing it, I know it said not to but I did and after settling it looked like algae was coating the top. Checking on my snails hours later and they were flinching and avoiding it. Confused I looked closer and it was like green crushed glass mixed in settling on the top. The occasional sparkle was glass shards thinkI’m not sure if this was a bad batch or just diamond black. I had previously bought a galaxy black same brand with no issues. Unfortunately this one can hurt snails. Both mystery and rabbit snail were trying to stay off it and would flinch while on it. I covered it with more gravel until I do I water change and they are seeming fine now. Thankfully I got a refund but beware.

Normal black gravel. Does not sparkle

I rinsed several times to find Everytime I put my hands near the gravel I get very bad cuts all over my hands. Today x3 spurs that are very hard that wouldn’t break down were lodged in my fingers frontside and back. Do not buy this product is it very dangerous!