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2. Raceway (aquaculture) - Wikipedia

   en.wikipedia.org/wiki/Raceway_(aquaculture)

   However, in most cases it is necessary to frequently clean raceways. The simplest way is to lower the water level in the raceway units, which increases the speed of the water current, and then herd the fish together till they flush the waste from the raceway. [17] Solid wastes which accumulate at the raceway bottom can be removed by pumps. [19]

3. Recirculating aquaculture system - Wikipedia

   en.wikipedia.org/wiki/Recirculating_aquaculture...

   Recirculating aquaculture systems (RAS) are used in home aquaria and for fish production where water exchange is limited and the use of biofiltration is required to reduce ammonia toxicity. [1] Other types of filtration and environmental control are often also necessary to maintain clean water and provide a suitable habitat for fish. [ 2 ]

4. Aquaculture - Wikipedia

   en.wikipedia.org/wiki/Aquaculture

   Recirculating aquaculture systems (RAS) recycle water by circulating it through filters to remove fish waste and food and then recirculating it back into the tanks. This saves water and the waste gathered can be used in compost or, in some cases, could even be treated and used on land.

5. Asellus aquaticus - Wikipedia

   en.wikipedia.org/wiki/Asellus_aquaticus

   Aquarists worldwide are showing increasing interest towards A. aquaticus as a low-maintenance freshwater aquarium pet and tank cleaner. While often sold as live food for other fish, some keepers in the US and Germany have started selectively breeding A. aquaticus to be sold as pets, usually from online platforms like eBay.

6. Freshwater aquarium - Wikipedia

   en.wikipedia.org/wiki/Freshwater_aquarium

   Tropical freshwater aquarium. Freshwater fish may be either coldwater or tropical species. Although freshwater aquariums can be set up as community tanks, coldwater and tropical fish are generally not mixed due to incompatibilities in temperature requirements. Coldwater aquariums house goldfish and other species that do not require a heating ...

7. Aquarium filter - Wikipedia

   en.wikipedia.org/wiki/Aquarium_filter

   In this design, water is fed by gravity to the filter below the aquarium. Prefiltered water is delivered to a perforated plate (drip plate). Prefiltering may take place in the aquarium via a foam block or sleeve in the overflow, or weir siphon, or it may be prefiltered by filter wool resting on the perforated plate. The waste laden water from ...