Fish Classification - Evaporation And The Water Level
Evaporation and the water level The water in an aquarium evaporates. This has no ecological consequences, but it does mean that the surface of the water comes into view at the top of the panes, which is hardly attractive. This must therefore be adjusted on a regular basis, usually at the same time as you make a partial water change. After a while a regular increase in the hardness of fresh water (or the salinity of sea water) is noticeable: the water that evaporates from the surface is fresh water containing no salts, even in sea water, and so there is a progressive concentration of salt or other mineral substances in the aquarium. To avoid this problem, replace the evaporated water with very soft or demineralized water in order to readjust the hardness or density. This can be done when you change the water, by slightly diluting the new water with fresh water. Readjustment of the water level is not necessary if you are using a drip that functions automatically.
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