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2. Bjerrum plot - Wikipedia

   en.wikipedia.org/wiki/Bjerrum_plot

   Example Bjerrum plot: Change in carbonate system of seawater from ocean acidification.. A Bjerrum plot (named after Niels Bjerrum), sometimes also known as a Sillén diagram (after Lars Gunnar Sillén), or a Hägg diagram (after Gunnar Hägg) [1] is a graph of the concentrations of the different species of a polyprotic acid in a solution, as a function of pH, [2] when the solution is at ...

3. Recirculating aquaculture system - Wikipedia

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

   The first step of nitrification in the biofilter consumes alkalinity and lowers the pH of the system. [11] Keeping the pH in a suitable range (5.0-9.0 for freshwater systems) is crucial to maintain the health of both the fish and biofilter. pH is typically controlled by the addition of alkalinity in the form of lime (CaCO 3) or sodium hydroxide ...

4. List of freshwater aquarium fish species - Wikipedia

   en.wikipedia.org/wiki/List_of_freshwater...

   Many color and tail pattern varieties exist. They generally need a ratio of 1 male to 2 females or more. All guppies and mollies are hardy fish that tolerate lower oxygen levels and temperatures than most aquarium fish, give birth to live young, and readily breed in home tanks. [58] can live in full sea water [59] 66 °F - 84 °F (19 °C - 29 °C)

5. 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.

6. 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]

7. Gran plot - Wikipedia

   en.wikipedia.org/wiki/Gran_plot

   If a pH electrode is not well calibrated, an offset correction can be computed in situ from the acid-side Gran slope: For a titration of acid by base, the acid-side slope ( − [ O H − ] 0 10 b 0 {\displaystyle -[OH^{-}]_{0^{}}10^{b_{0}}} ) can serve to compute b 0 {\displaystyle b_{0^{}}} using a known value of [ O H − ] 0 {\displaystyle ...