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.
Inside each kidney there are more than one million tiny units called nephrons. Each nephron is made up of a very small filter called a glomerulus, which is attached to a tubule. Water and waste products are separated from the blood by the filters and flow into the tubules. Much of this water is reabsorbed by the tubules and the wastes are concentrated into urine.