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Post by Carl on Nov 27, 2022 12:45:58 GMT -5
One of our most read articles: www.americanaquariumproducts.com/AquariumKH.htmlHere is a key excerpt from the GH section: "Back to GH in general; although many aquarists worry about “too high GH” (based on respiration problems), this is based on long ago proven false myths. In reality, freshwater generally would take a GH of over 500 ppm to cause this problem. This said, keeping a GH closer to the fish' natural biotope is certainly desirable, if only for the fact some diseases such as Columnaris can adhere better at high GH levels (especially above 400 pm), Just do not make the mistake of driving out mineral Cations in the process which could lower natural resistance to diseases. More importantly as to respiration, the surface epithelia of gills and body surfaces are protected from direct interaction with the environment by mucous and intercellular junctions. Fish mucous has been postulated to have calcium binding properties. Mucous is a glycoprotein and could serve as a calcium chelating agent retarding ion loss from epithelial cells as a charged surface coat or barrier and thus is dependent on calcium for normal function. Intercellular junctions are specialized areas of attachment between epithelial cells preventing the loss of ions and fluids from the membrane which bathes and surrounds the cells beneath."
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