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2. White Cloud Mountain minnow - Wikipedia

   en.wikipedia.org/wiki/White_Cloud_Mountain_minnow

   This makes it an ideal fish for keeping in an unheated aquarium in cold climates. In fact, White Clouds are more active and healthier when kept at temperatures lower than those at which most tropical tanks are kept. Water hardness should be from 5 to 19, and pH levels should range between 6.0 and 8.0. Also, the aquarium should have a top.

3. 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!

4. 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]

5. Freshwater aquarium - Wikipedia

   en.wikipedia.org/wiki/Freshwater_aquarium

   A biotope aquarium is an aquarium that is designed to simulate a natural habitat, with the fish, plants, and furnishings all representative of a particular place in nature. [5] Because only species that are found together in nature are allowed in a true biotope aquarium, these tanks are more challenging and less common than the other themes.

6. Lake ecosystem - Wikipedia

   en.wikipedia.org/wiki/Lake_ecosystem

   Lakes and ponds that contain bedrock that is rich in carbonates have a natural buffer, resulting in no alteration of pH. Systems without this bedrock, however, are very sensitive to acid inputs because they have a low neutralizing capacity, resulting in pH declines even with only small inputs of acid. [ 3 ]

7. Pond loach - Wikipedia

   en.wikipedia.org/wiki/Pond_loach

   The pond loach is an exceptionally peaceful, hardy species, capable of withstanding unheated aquariums, and preferring to live in outdoor ponds. Not being a tropical species by nature, water temperatures above 70 °F to 75 °F (21.11 °C to 23.89 °C) are not recommended for, and can cause respiratory issues, fatigue, and even death, in pond ...

8. Freshwater fish - Wikipedia

   en.wikipedia.org/wiki/Freshwater_fish

   Fish are very sensitive to changes in water pH, salinity, hardness, and temperature which can all be affected by runoff pollutants and indirect changes from land use. Freshwater fish face extinction due to habitat loss, overfishing, and "forever chemicals." Conservation efforts, sustainable practices, and awareness are crucial in maintaining ...

9. pH meter - Wikipedia

   en.wikipedia.org/wiki/PH_meter

   A pH meter is a scientific instrument that measures the hydrogen-ion activity in water-based solutions, ... [25]: 131–135 In its first full year of sales, ...