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  2. Alkalinity - Wikipedia

    en.wikipedia.org/wiki/Alkalinity

    Total alkalinity is not (much) affected by temperature, pressure, or pH, and is thus itself a conservative measurement, which increases its usefulness in aquatic systems. All anions except HCO − 3 and CO 2− 3 have low concentrations in Earth's surface water (streams, rivers, and lakes). Thus carbonate alkalinity, which is equal to [HCO − ...

  3. Calcium reactor - Wikipedia

    en.wikipedia.org/wiki/Calcium_reactor

    The reaction frees the calcium and carbonate, supplying the aquarium with water rich in Ca 2+ and CO 3 2−, important for maintaining alkalinity and calcium levels. A bubble counter is used to visually (or audibly) measure the carbon dioxide rate (bubbles per minute).

  4. Total dissolved solids - Wikipedia

    en.wikipedia.org/wiki/Total_dissolved_solids

    Total dissolved solids (TDS) is a measure of the dissolved combined content of all inorganic and organic substances present in a liquid in molecular, ionized, or micro-granular (colloidal sol) suspended form. TDS are often measured in parts per million (ppm). TDS in water can be measured using a digital meter. [1]

  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. Water quality - Wikipedia

    en.wikipedia.org/wiki/Water_quality

    An electrical conductivity meter is used to measure total dissolved solids. The following is a list of indicators often measured by situational category: Alkalinity; Color of water; pH; Taste and odor (geosmin, 2-Methylisoborneol (MIB), etc.) Dissolved metals and salts (sodium, chloride, potassium, calcium, manganese, magnesium)

  7. Total boron - Wikipedia

    en.wikipedia.org/wiki/Total_boron

    Total boron is an important quantity when determining alkalinity due to borate's contribution to a solution's acid neutraling capacity. Total boron is a conservative element in seawater, and can thus be calculated by simply knowing the salinity.

  8. Urban aquaculture - Wikipedia

    en.wikipedia.org/wiki/Urban_aquaculture

    Raising fish in cages in a lake in a relatively undeveloped environment. Urban aquaculture employs water-based systems, the most common, which mostly use cages and pens; land-based systems, which make use of ponds, tanks and raceways; recirculating systems are usually high control enclosed systems, [clarification needed] whereas irrigation is used for livestock fish.

  9. Glassy sprat - Wikipedia

    en.wikipedia.org/wiki/Glassy_sprat

    A brackish tank is required; normal water has different pH and alkalinity than sea water. The pH value of brackish tank should be around 8(±0.5 )and a specific gravity of 1.012(±0.8), At the same time, you need to use a humidifier to regulate the temperature of the aquarium to around 25 degrees Celsius.

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