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CASUEWAY
CASUEWAY Aquarium Natural Lava Rock Pieces Filter Media

CASUEWAY Aquarium Natural Lava Rock Pieces Filter Media

Best price now

$26.38at Castle Dawn AquaticsObserved at 1:15 AM

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Our take on the CASUEWAY Aquarium Natural Lava Rock Pieces Filter Media

CASUEWAY's lava rock pieces are porous biological filter media sold with a mesh filter bag. The rough, pitted surface gives nitrifying bacteria a large area to colonize, and the same rocks work as substrate, plant anchors or hardscape. At $19.99 at eBay as of November 4, 2026, it is the best new price among the two stores listing it.

Best forShrimp and nano tanks needing biological filtrationPlant keepers who want to anchor roots and mossBudget setups that double as hardscapeTanks where a bagged media is easier to rinse and swap
Pros
  • Porous surface supports nitrifying bacteria
  • Doubles as substrate, plant anchor and hardscape
  • Comes with a filter bag for easy placement and rinsing
  • Lava rock is inert and won't shift pH much
  • Cheap way to add biological capacity
Cons
  • Pieces vary in size and shape, so bag fill is uneven
  • Rough edges can trap debris and need periodic rinsing
  • Must be washed thoroughly before use or dust clouds the water
  • Heavy for its volume compared with ceramic media
  • No stated piece count or weight

CASUEWAY Aquarium Natural Lava Rock Pieces Filter Media prices at every store

  • Castle Dawn AquaticsNew

    In stock

    $26.38Observed at 1:15 AM
    Visit store

Also available at

  • eBayCheck price at eBay

CASUEWAY Aquarium Natural Lava Rock Pieces Filter Media price history

Lowest price we've seen: $26.38 on Nov 4 at Castle Dawn Aquatics. Tracked across 1 store since Nov 4.

Specifications

Product Type
Filter media, Aquarium Filter Media
Efficiency
Large surface area for nitrifying bacteria
Media Type
Lava rock
Filtration Method
Biological (Large surface area for nitrifying bacteria)
Media Included
Filter bag
Filtration Stage
Biological filter
Maintenance Type
Wash
Material Type
Lava rock
Material Construction
Porous
Animal Type
Shrimp aquariums
Installation Requirements
Wash before use

Questions and answers

Is lava rock good biological filter media?
Yes. Its porous, pitted surface hosts nitrifying bacteria, and it is a common low-cost alternative to ceramic rings. It works best in a bag placed where water flows through it.
Do I need to wash it before putting it in the tank?
Yes. Rinse the pieces in a bucket until the water runs mostly clear. Skip soap, and don't scrub so hard that you knock off the porous surface.
Can I use it in a shrimp tank?
Yes. Lava rock is inert and gives shrimp surface to graze on. Rinse it well first, and check pieces for sharp edges if you keep very small shrimp.
Can it be used as substrate or to hold plants?
Yes. The pieces work as a bottom layer or as anchors around roots and moss. They are chunky, so they suit larger tanks better than fine carpeting plants.
Is $19.99 a good price?
It is the best new price among the two stores listing it as of November 4, 2026. Lava rock is a commodity, so compare by weight or piece count before buying.
Where is the CASUEWAY Aquarium Natural Lava Rock Pieces Filter Media cheapest?
At Castle Dawn Aquatics, for $26.38, as of our latest check.
Where can I buy the CASUEWAY Aquarium Natural Lava Rock Pieces Filter Media?
2 stores we checked sell it, including Castle Dawn Aquatics, eBay.