most fish live in a pH range of 5.5 to 7.5
they vary on species and lake or river of species.
Normal blood pH is 7.32 to 7.42. Normal urine pH is between 6 and 8 though the closer to 7 the better.
The acidity for tropical fish? I think your referring to the acidity of the water in their aquarium...??? Generally, "tropical fish" do well with a neutral (7.0) or slightly acidic (6.7-6.9) PH level in the water of the tank. This is easy to test using a PH test kit from your pet store. The acidity of the water is affected by whatever is IN the water with the fish---in the wild, the flora and fauna of the area dictates the PH (acid-neutral-alkaline) of the water. In general most of the common tropical fish (freshwater) sold in pet stores come originally from central/south America and Asia. The waters in these areas are slightly to mid level acidic depending on the time of year. These fish would be the common "community" tropical fish like tetras, gourami's, live bearers (guppies, mollies etc) and algae eaters/scavengers. The larger "cichlids" like Oscars, Jack Dempsy's etc are also from South America but are aggressive. All do fine with an PH (acidity of 6.8-7.0) as most are commercially raised now anyway. Don't put "wild" rocks in your tank as they could contain pollutants and be very calcium rich (like sea shells) and raise the PH to above 7.0 into the Alkaline level. Some fish (like the African Cichlids) prefer a high alkaline environment... Hope this helped, Jason
The pH scale runs from 0 to 14, with 0 being extremely acid and 14 being extremely basic (alkaline). Water with a pH 7 is dead neutral. This is a suitable pH for keeping most tropical fish. If your pH of your water is less than 6.8, it is considered acid water. Fish suitable for acid water include apistogramma dwarf cichlids, angelfish, discus, tetras, gouramis, rasboras, danios, many catfish and barbs. If your pH is more than 7.4 it is considered alkaline. Suitable species for this water include kribensis, some other cichlids, rainbowfish, livebearers (guppies, mollies, platys and swordtails) most barbs and most catfish. Some water is very alkaline, with a pH of over 8. This is generally suitable only for fish that have adapted to survive in these conditions, such as African cichlids - but these are large and demanding, so do plenty of research before you buy a tank for them.
the water is more alkaline than a soution with a ph of 10
The normal pH range would be like 6.5 to 7.5, pretty much neutral most of the time
normal pH of sweat is between 4.3 to 4.7
7.0 is neutral.
The normal bllod pH in humans is 7.40 with a normal range of 7.35 to 7.45.
Lower numbers are more acidic. The normal range for pH is 0-14. However, it's possible to go beyond that range (2M HCl has a negative pH); I'm not certain what the absolute lowest (or highest) possible value is.
Normal serum pH is slightly alkaline and ranges from 7.35-7.45
pH range for Koi is 6.5 - 8.5. Outside of this range they will endure stress.
7.35-7.45
Normal blood pH is around 7.4 A normal saliva pH range is somewhere between 6.0 to 7.4
Normal PH for arterial blood is 7.4 and it is basic ph below 7 is acidic and 7 to 7.3 is neutral
Normal PH for arterial blood is 7.4 and it is basic ph below 7 is acidic and 7 to 7.3 is neutral
~4 to ~7.5