Seachem Flourite Black 7 kg / 15.4 lbs

Yes, probably best to wash it... but honestly not the end of the world if you don't (unless you try adding it to an existing tank with no backup tank to put existing fish from that tank). It will take a couple of days for the dust to settle if you don't rinse it. And if you stir it up again by moving things or planting, it will take a couple more. However, over time, the dust settles down beneath the rocks and is harder to disrupt. I didn't wash mine on a new tank setup and it was barely cloudy for a few days. No fish went in right away so no problem. I think the dust is probably good for the plants since the smaller particles are easier to absorb than whole rocks. I got a second bag of the dark reddish flourite and put that into an existing tank and it got very cloudy, like a storm on Mars or something. Even that cleared up within about 36 hours. (I did have to relocate my fishes to other tanks though because I don't want them choking on the dust) I used the flourite as well as fertilizing tabs by seachern, and my plants are very healthy and grow very fast, including a nice thick carpeting of monte carlo. In contrast with another tank I have without "plant supporting" substrate, the tanks with the flourite grow plants much faster (with same brand lighting, and no Co2, just liquid fertilizer from seachern.) I'd recommend a light rinsing if you're in a hurry to get a tank setup, and definitely if you're adding it to an existing tank. The color is awesome and looks very natural, which is rare for a black substrate. I've bought a couple different brands I threw out because they just looked unnatural in black (one was obviously painted :/ ) So I really like this substrate and have already bought more. I think you'll like it too as long as you're prepared to let the dust settle over a few days. :D

It's true, this stuff is dusty. I put the gravel right in my tank, didn't bother rinsing since the instructions say rinsing is optional, and I didn't want to lose a bunch out the strainer and down the drain. My tank was cloudy for the rest of the evening but had nearly cleared up by the next morning. That day I added a little more, so the water got cloudy again, but was cleared by the next evening. I just let my filter run and had a little faith. I did have to change my brand new filter after the dust settled, but since then it hasn't been a problem. I now enjoy crystal clear water with a fabulous black substrate without any epoxy or rubber coating. I have no new dust coming up, even when the fish nose around in it. Since you have to cycle your tank and gravel for at least a week before adding fish, a few days of cloudiness isn't a problem, and the advantages outweigh the temporary ugliness. I am a first time fish/aquatic plant keeper, and thanks to this gravel and a few doses of Flourish, my plants are growing up and out of my tank, even with barely adequate lighting! I am planing on trying the Flourite sand for my next tank, and really do feel great telling other people about this product. Just be prepared to not see the back of your tank for a few hours. :)

2nd time purchasing as i needed more for upgrading to bigger tank. Cant get over how good this gravel really is, love the black appearance to my floor just looks great! would choose this 1000 times. good for corydoras as mine have been doing good and healthy, no shortened whiskers they love it

Do not put this in your tank without rinsing this. You see what I’m talking about. You have to rinse it several times. Make that many times. If you don’t you’ll never get your water clear. You’ll have to drain the water remove it and then rinse and rinse …

Almost all the bad reviews related to this product refers to how dirty it makes your water. There is a simple remedy. 24hrs after filling my new tank with unwashed Flourite Black I had a crystal clear tank. Open bags and pour directly into an empty aquarium. Place all rocks, fixtures, decor and plants before filling. When it comes time to fill the tank you can't just stick a hose in at full blast or dump buckets of water into your tank. Instead trickle fill with a hose onto a plate, into a small bowl or over a large rock to disperse the water flow so it does not disturb the substrate. I personally used a pitcher to pour water into the tank. This takes a while but it is a lot less work than rinsing this stuff in a bucket multiple times only to find that the water is always cloudy when finished anyways. You will still get a rather cloudy water but all you have to do is run your filter for 24 hrs and then add the magic secret (Although you could probably use it immediately. I had to wait for Amazon to ship it to me the next day). I used a product called API Accu-Clear. You can buy it on Amazon for about $8 for an 8oz bottle, however it only takes 1/2 cap-full to treat a 50gal tank. You can find numerous other aquarium clarifiers on Amazon from other producers if you prefer, but I can only vouch for API since that is the one I used. 20 mins later you will have a crystal clear tank. The pictures attached show it's effectiveness.

After a couple of weeks my plants finally started to establishing strong roots. Just to note that I am adding some fertilizer to the tank. But this substrate made the difference mostly. The rinsing process is not as overwhelming as some people say. People seems to be overdoing it. Just try to handle it as less as possible. I filled a thin nylon socks with some of these and rinsed in the sink. Then just to be extra cautious I put them into a soda bottle and and filled it with water and pour the sand to the tank while the whole bottle is under the water. As a result I spent less than 30 minutes per bag, and the water in the tank was only slightly cloudy which completely cleared within a day or so. But honestly the next time I will buy this again, I will not use the soda bottle at al. This will cut the preparing time down to 15 minutes per bag or less. I suggest the same for everyone. Just rinse it inside a women nylon socks or something similar, but just not in a BUCKET. You will definetly not end up with a terrible cloudy water. And any cloudiness will disappear. Just be patient for a few days.

I read many reviews before taking the plunge and ordering Seachem Flourite Black. Many people were disappointed by the cloudiness caused by this product, but a deep dive into other reviews made it clear that the product HAS to be rinsed thoroughly before putting into your tank. I had a devastating tank crash of my 60 gallon salt water aquarium. I lost everything except 1 fish and two coral. I decided to wait before starting a SW tank again and converted the existing tank into a freshwater aquarium as my Angels had out grown their 29 gallon tank. I ordered three bags of Seachem Flourite Black and flushed the product in half bag increments in a 5 gallon pale. It took about 3 to four rinsings before the real dark muck disappeared. I set the tank up on Saturday 8/29 with my Angels and some of their buds. I have to say, the cloudiness has been at a minimum. I added two capfuls of Clarity. Sunday and Monday one capful. By today, 9/1 the tank is noticeably clearer. The picture is from yesterday 8/31. I have added plants and no other fine particles or silt have been stirred up as some people complained about. I will monitor how well it "feeds" the plants as it is supposed to be primarily for planted aquariums.

Bueno este es otro producto de fama internacional sin palabras excelente, llego en su empaque en perfectas condiciones gracias

Easy to install just rinse let settle .

Produtos da marca seachem, vc pode comprar de olho fechado, pois até o momento, não conheço nenhum que seja ruim. Utilizo vários produtos da seachem, como ração clorella flakers, purigen, seagel, acid buffer, alkaline buffer, prime, stability, flourish e stress guard, todos muito bons e agora o substrato flourith black.

Amazing quality but rinse very well until no cloud or murky water. Great for shrimps tanks to help them contrast against the substrate. First time using the product recently and I’m adding to all tanks to enhance my aquascaping attempts. If you have Corey or other bottom feeders, you may want to use sparsely and still have sanded areas for those that nuzzle subrate for food. Easy to gravel vac Highly recommended, any questions just ask

Used Flourite to replace 66% of the gravel in my 200l aquarium while the fish were in it. Washed the Flourite in colander till water was clear. 1) Removed plants and vacuumed old gravel. 2) Took out the gravel where the plants were (fish loved it, kept getting in the way, especially the guppies) this did cause murkiness. 3) Waited an hour for murkiness to subside, added the Flourite and it definitely did not add to murkiness. 4) Filled aquarium, ran filter for two hours, water quite clear. 5) Switch of filters, replace plants. 6) Switch on filters (2 internal canister filters and under gravel filter with 3 200l/h power heads). Two hours later water 90% clear, by morning glass clear. I also used the same batch of Flourite for a new 50l nano tank, zero murkiness. Have had aquariums for 30 years, used many gravels that I always pre-washed, so I can confidently state that the Flourite after washing is among the cleanest substrates. Fish all alive and well and plants definitely happier than in my old plain gravel.

Bought this for my new 75gal tank that will be planted. I love it, it looks amazing and most of the reviews complained about it leaving a thick grey film or really cloudy water well it says right on the bags to rinse it, so that what I did, I used an old wash tub with a window screen over it and a medium sized colander. I did one bag at a time, poured it into the colander and rinsed it with a low flow of water, mixing it until the water ran mostly clear. Put it in my tank and the water was a little cloudy but 24 hours later with my filter running the water is crystal clear. I would definitely buy this again for another aquarium.