When newborns do have problems with hypothyroidism, the problems may include: 1  Yellowing of the skin and whites of the eyes (jaundice). 2  Frequent choking. 3  A large, protruding tongue.  A puffy appearance to the face.
Check chlorine level in pool water at least daily with a pool testing set and add this product as needed to maintain 0.6 to 1.0 ppm available chlorine. One pint of Clorox Bleach-Regular Scent per 6,000 gallons of water will supply approximately 1.0 ppm available chlorine.
The conservative rule is to test after an hour, but in a pool with good circulation most of the chlorine is disbursed in around 10 minutes and the chlorine level doesn't change after around 20 minutes. I've done this sort of test in my own 16,000 gallon pool with 3 returns, one skimmer and two floor drains.