18lb Black Lava Rock for Plant, 1/8-1/4 inch Horticultural Volcanic Rock Soil for Decorative Landscaping Bonsai, Cacti, Succulents Plants Top Dressing for Release Excess Water

Perfect

Gives my succulents a mulch and contrast helps their appearance

I am pleased with the product, as it serves as part of the bottom-level substrate mix for my smaller planted aquariums, which are capped with sand (~10 gallons). It is as pictured and of the volume noted. The black 5lb bag was ideal (a tall 10-gallon vase and a tall 10-gallon rectangle). Given the cost and size of individual pieces, I would probably not use the 5-lb bag in a larger aquarium, but would purchase a large amount. NOTE: I would definitely rinse the lava rock thoroughly before using it in an aquarium to remove dust.

Helps to drain water from pot

If you're using them for something outside (outdoor plants, decorative paths, etc.) they are very matte. They absorbed much more heat than anticipated, so I had to reduce the amount I used in my garden to try and reduce water use in certain plants. They made the pots I put them in on the top HOT, and I live in a cool climate. So they're not the stones for this project. On the top of plants they do not retain water. If you mix them on with soil or put them on the bottom they do much better.

Perfect for those plants that don’t need as much water. Color is perfect black. Low dust content. Great value for the money.

I love how the size is consistent and small - most are between 1/8" and 1/4" so they work well in my DIY Pon mix. I just wish they cost less.

Added to my cactus mix. Great product