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2. Freshwater environmental quality parameters - Wikipedia

   en.wikipedia.org/wiki/Freshwater_environmental...

   The toxicity of ammonia is dependent on both pH and temperature and an added complexity is the buffering effect of the blood/water interface across the gill membrane which masks any additional toxicity over about pH 8.0. The management of river chemistry to avoid ecological damage is particularly difficult in the case of ammonia as a wide range ...

3. Reef aquarium - Wikipedia

   en.wikipedia.org/wiki/Reef_aquarium

   In particular, ammonia, nitrite, nitrate, pH, salinity, alkalinity, calcium and phosphate levels should be monitored closely. When it comes to nano reefs, even minute changes in water conditions such as mild temperature fluctuations can be problematic, whereas the greater water volume of larger aquariums provides a more stable and flexible ...

4. Rhodium (III) nitrate - Wikipedia

   en.wikipedia.org/wiki/Rhodium(III)_nitrate

   However, a dihydrate and an aqueous solution are known with similar stoichiometry; they contain various hexacoordinated rhodium(III) aqua and nitrate complexes. [3] A number of other rhodium nitrates have been characterized by X-ray crystallography : Rb 4 [ trans -[Rh(H 2 O) 2 (NO 3 ) 4 ][Rh(NO 3 ) 6 ] [ 4 ] and Cs 2 [-[Rh(NO 3 ) 5 ]. [ 5 ]

5. 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 ...

6. Aquarium - Wikipedia

   en.wikipedia.org/wiki/Aquarium

   An aquarium can be placed on an aquarium stand. Because of the weight of the aquarium, a stand must be strong as well as level. A tank that is not level may distort, leak, or crack. [47] These are often built with cabinets to allow storage, available in many styles to match room decor. Simple metal tank stands are also available. [47]

7. UAN - Wikipedia

   en.wikipedia.org/wiki/UAN

   The combination of urea and ammonium nitrate has an extremely low critical relative humidity (18% at 30 °C) and can therefore only be used in liquid fertilizers. The most commonly used grade of these fertilizer solutions is UAN 32.0.0 (32%N) known as UN32 or UN-32, which consists of 45% ammonium nitrate , 35% urea and only 20% water.

8. Iron(III) nitrate - Wikipedia

   en.wikipedia.org/wiki/Iron(III)_nitrate

   Iron(III) nitrate, or ferric nitrate, is the name used for a series of inorganic compounds with the formula Fe(NO 3) 3. (H 2 O) n. Most common is the nonahydrate Fe(NO 3) 3. (H 2 O) 9. The hydrates are all pale colored, water-soluble paramagnetic salts.

9. List of freshwater aquarium fish species - Wikipedia

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

   4.5 cm (1.8 in) Redflank bloodfin: Aphyocharax rathbuni: 4.5 cm (1.8 in) Rosy tetra: Hyphessobrycon rosaceus: 4 cm (1.6 in) Royal tetra: Inpaichthys kerri: 3.5 cm (1.4 in) Possesses an adipose fin allowing it to be differentiated from the Emperor tetra [38] Ruby tetra: Axelrodia riesei: 2 cm (0.79 in) Rummy-nose tetra: Hemigrammus rhodostomus ...