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An improper nitrogen cycle, inappropriate aquarium plants and potentially harmful freshwater invertebrates can directly harm or add to the stresses on ornamental fish in a tank. Despite this, many diseases in captive fish can be avoided or prevented through proper water conditions and a well-adjusted ecosystem within the tank.
The pump should only be powerful enough to push the water through the filtering material as well as overcome the drag in the intake and return pipes. This makes canister filter pumps virtually insensitive to the height difference between the aquarium and the filter (although exceeding the manufacturer-specified height limit can lead to leaks).
An improper nitrogen cycle, inappropriate aquarium plants and potentially harmful freshwater invertebrates can directly harm or add to the stresses on ornamental fish in a tank. Despite this, many diseases in captive fish can be avoided or prevented through proper water conditions and a well-adjusted ecosystem within the tank.
Between the blood lead levels of 5 and 35 μg/dL, an IQ decrease of 2–4 points for each μg/dL increase is reported in children. [42] However, studies that show associations between low-level lead exposure and health effects in children may be affected by confounding and overestimate the effects of low-level lead exposure. [83]
The district's standard of 5 ppb is more strict compared to the state and federal guidelines of 15 ppb, which the U.S. Environmental Protection Agency set as the action level for lead in drinking ...
High blood levels of lead have been linked to a wide variety of health problems, including severe gastrointestinal, neuromuscular, and neurological symptoms. [ 5 ] [ 6 ] These problems are especially significant in children, and childhood lead poisoning can lead to behavioral problems, developmental disorders, and permanent decreases in IQ.
The US Centers for Disease Control and Prevention and the World Health Organization state that a blood lead level of 10 μg/dL or above is a cause for concern; however, lead may impair development and have harmful health effects even at lower levels, and there is no known safe exposure level. [5]
Between 2000-2010, the mean blood lead levels in Saline Co. averaged 16.5 ug/dL, more than double that of all other counties in Kansas which averaged 7.5 ug/dL [83] [84] and children living in the city of Salina, had a significantly higher mean blood lead level (3.00 μg/dL) compared to children living in all other Kansas zip codes (2.86 μg/dL ...