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Representative imageBlack lava rock, 3/4 inch
1 lb and 5 lb bags
Lava rock.
Black and burgundy lava rock in 3/8 and 3/4 inch grades. Compare the texture, size, and bag weight before planning a hardscape or filter basket.
- Match the actual size and texture to the job. A name or color alone does not establish chemistry or animal suitability.
- Product pages show confirmed preparation details. Missing claims are left out rather than guessed.
- The bag weight and box capacity are different measures. Your cart calculates both.
Representative imageFrom $4.99
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Representative imageBlack lava rock, 3/8 inch
1 lb and 5 lb bags
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Representative imageBurgundy lava rock, 3/8 inch
1 lb and 5 lb bags
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Representative imageBurgundy lava rock, 3/4 inch
1 lb and 5 lb bags
Choose by the job.
Choose the grade for the job
Lava rock starts with texture: open, irregular surfaces and visible cavities. The National Park Service explains the volcanic processes behind scoria, but a geological description cannot confirm the chemistry of a particular bag. Our black and burgundy materials are washed and screened. Their effect on water is still awaiting confirmation, so we do not promise that they are inert or appropriate for every aquarium.
The 3/8 inch and 3/4 inch grades are separate choices. Compare the actual compartment, retaining screen, and cleaning access before buying filter media. A small basket needs more than a nominal stone size: handles, plumbing, and space to remove the contents all reduce its usable volume. Follow the equipment maker's instructions rather than assuming a loose bag belongs in every filter.
Look at the surface animals will reach
Hardscape, contained media, and an exposed floor are different uses. Consider whether an animal rests on the material, mouths it, or moves through narrow gaps. Rough loose lava is not a default floor for reptiles or substrate-sifting fish. Confirm suitable material and a stable arrangement before introducing it to the enclosure.
Black and burgundy offer different appearances. Color does not prove identical composition, absence of treatment, or a specific effect on pH. A negative household-vinegar observation also cannot establish every relevant property. Read what that test can and cannot show before choosing a material for chemistry-sensitive water.
Order from a measured space
Both grades are offered in 1 lb and 5 lb bags. A bag weight does not specify a fixed number of pieces, and the calculator's bulk density is a planning estimate. Measure the usable space, calculate approximate volume, then compare the bag mix and complete shipping total. The cart shows how the chosen bags share boxes.
Representative wet and dry views illustrate light and texture. Actual photography will replace them when available. Use the product's confirmed information for factual decisions, and use the image for a visual comparison. Continue with lava sizes and filter-media planning.