The recommended level of free available chlorine to keep in your pool is between 1.0. and 3.0 ppm or parts per million. For spas, the recommended level of free available. chlorine is between 1.50 and 3.0 ppm. (For the definition of parts per million and other pool- and spa-related terms, see the.
The tiny filtering units of kidney are the nephrons.there are millions of them in our body.they contain a number of network of tubes, cells and canals specialised in transmittâ¦ingThe kidney is responsible for maintaining fluid balance within the body. The basic structural and functional units of the kidneys are the nephrons.
Nephrons are the smallest functional filtering units of the  kidneys. They are located in the adrenal cortex (outer crust) which  is considered the urine manufacturing facil â¦ ity.ephrons remove waste from the blood and produce urine.    A nephron is a functional unit of the kidney that consists of  glomerulus and other tubules via which the glom â¦ erular filtrates  pass through before eventually coming out in the form of urine.