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  2. Lava filter - Wikipedia

    en.wikipedia.org/wiki/Lava_filter

    At present: 2 types of systems are used; constantly submerged lava filters (for treatment ponds, combined treatment ponds/irrigation reservoirs, ...) not-submerged lava filters (for wastewater treatment; wastewater is simply sprayed on the pebbles with this system) [2]

  3. Algae scrubber - Wikipedia

    en.wikipedia.org/wiki/Algae_scrubber

    An algae scrubber allows algae to grow, but the algae grow inside the filter instead of in the aquarium or pond. This removes excess nutrients (scrubs the water), diminishing nuisance algae in the aquarium or pond . Nuisance algae in the aquarium or pond are not to be confused with the desired algae in the algae scrubber filter itself.

  4. Live rock - Wikipedia

    en.wikipedia.org/wiki/Live_rock

    In J. Charles Delbeek's article Your First Reef Aquarium, [2] he states, The use of live rock immediately introduces into the aquarium numerous algae, bacteria and small invertebrates all of which contribute to the overall quality of the aquarium water. Live rock has just as much, if not more, surface area for bacteria than a trickle filter.

  5. Aquarium filter - Wikipedia

    en.wikipedia.org/wiki/Aquarium_filter

    Aquariums are usually much more densely stocked with fish than the natural environment. This increases the amount of ammonia produced in the relatively small volume of the aquarium. The bacteria responsible for breaking down the ammonia by converting it to nitrite, Nitrosomonas , colonize the surface of any objects inside the aquarium.

  6. Riprap - Wikipedia

    en.wikipedia.org/wiki/Riprap

    [1] [2] [3] Common rock types used include granite and modular concrete blocks. [4] [5] Rubble from building and paving demolition is sometimes used, [3] [6] as well as specifically designed structures called tetrapods or similar concrete blocks. Riprap is also used underwater to cap immersed tubes sunken on the seabed to be joined into an ...

  7. Airstone - Wikipedia

    en.wikipedia.org/wiki/Airstone

    A spherical airstone at the Osaka Aquarium alongside a trio of red stingray pups, Hemitrygon akajei. An airstone, also called an aquarium bubbler, is a piece of aquarium furniture, traditionally a piece of limewood or porous stone, whose purpose is to gradually diffuse air into the tank, eliminating the noise and large bubbles of conventional air filtration systems, and providing other ...

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