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2. Water ionizer - Wikipedia

   en.wikipedia.org/wiki/Water_ionizer

   Despite being described as 'water ionizers', the machines are designed to work as water electrolyzers. [3] This is an electrochemical process in which water is split to form hydrogen and oxygen by an electric current. [1] [18] In some machines, the process produces calcium hydroxide and hydrochloric acid through the use of an ion-exchange ...

3. Water purification - Wikipedia

   en.wikipedia.org/wiki/Water_purification

   Fresh water can have widely ranging pH values depending on the geology of the drainage basin or aquifer and the influence of contaminant inputs . If the water is acidic (lower than 7), lime, soda ash, or sodium hydroxide can be added to raise the pH during water purification processes. Lime addition increases the calcium ion concentration, thus ...

4. 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]

5. Aquaponics - Wikipedia

   en.wikipedia.org/wiki/Aquaponics

   Aquaponics is a food production system that couples aquaculture (raising aquatic animals such as fish, crayfish, snails or prawns in tanks) with hydroponics (cultivating plants in water) whereby the nutrient-rich aquaculture water is fed to hydroponically grown plants.

6. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. pH - Wikipedia

   en.wikipedia.org/wiki/PH

   The pH range is commonly given as zero to 14, but a pH value can be less than 0 for very concentrated strong acids or greater than 14 for very concentrated strong bases. [2] The pH scale is traceable to a set of standard solutions whose pH is established by international agreement. [3]

8. Fishkeeping - Wikipedia

   en.wikipedia.org/wiki/Fishkeeping

   An aquascaped freshwater aquarium. Fishkeeping is a popular hobby, practiced by aquarists, concerned with keeping fish in a home aquarium or garden pond.It is a practice that encompasses the art of maintaining one's own aquatic ecosystem, featuring a lot of variety with various water systems, all of which have their own unique features and requirements.

9. Freshwater aquarium - Wikipedia

   en.wikipedia.org/wiki/Freshwater_aquarium

   For a tropical fish tank, maintaining a warm environmental temperature ranging between 75 and 86 °F (24 to 30 °C) enables different tropical fish to thrive at different temperatures. [2] Aquarium substrate usually consists of sand or gravel. Aquarium substrate is important for the fish's health and replicating their natural environment.