I bought a 5lb bag for my 5.5gal betta tank and it covered the entire tank plus a small bank in the back and room for a few plants. If you want a heavily planted tank, a larger amount would work better, but 5lb is fine for a handful of small plants. I rinsed it thoroughly but didn't notice much dirt or anything come off. Never got cloudy in my tank (unlike all the gravels/sands I've tried in the past), never left residue, looks incredible! It's not entirely black, there are specks of white poking through on some of the larger gravel pieces but that's to be expected. Will definitely buy again in the future!

Nice color. Goes great with the larger gravel I mixed it with. It was a great choice for me.

Gravel was as expected but delivery was stupid. One bag had a hole in it and they just threw the bags on the porch. No box or labels or anything.

Really great coloring, nice texture. This aquarium gravel is superior to the previous brand I bought. It's nice and smooth and the red color really pops.

Love the color it works great for the design i did in the garden.

I am buying more so I have it went I go to a bigger Tank All substrate has to go through the nitrogen cycle and completely cycle before going into a tank with live fish...I looked at the negative comments and immediately thought of this. Seachem stability and some fish food will get it going but does take 8 weeks to really be safe no matter what it is. I did it in 6 weeks and had to quickly put my fish in an isolation tank till the tank cycled...zero ammonia, zero nitrites, (yes zero, the tank really cycles and these both spike when they are going thru the process, esp. when it is about done.) then water changes for nitrates.

I've kept tanks for 40 years and have never encountered what amounts to a bad bacteria in these rocks, that once isolated from oxygen will produce hydrogen sulfide gas in your tank. Rinse all you want, it will only activate this bacteria. Once in the tank, it soon clouds the water, fish become listless, then paralyzed. A devastating, fatal disaster!! These poor fish. This awful company!!

Attention Fish Parents: Do not buy these rocks if you want your fish to live. I recently purchased these rocks to replace the old ones in my tank. In my tank I have four goldfish and an albino bristlenose pleco. My fish have been used to the water changes I do and have always been fine after I’ve done it. When I was switching out the rocks I also did a water change. Unfortunately less than 24 hours after, all my fish were dead. Normally they are fine with the water changes and are pretty hardy fish. If my one fish can survive jumping out of the tank he can handle a little water change. The only difference I could after the water change was the new rocks. After reading reviews of this product, which I wish I would’ve done sooner, I realized that other people have gone through the same problems as I have. So to protect your fish please do not purchase these rocks!!