The second dose of MMR may be given as early as 4 weeks after the first dose, and be counted as a valid dose if both doses were given after the first birthday. The second dose is not a booster, but rather it is intended to produce immunity in the small number of people who fail to respond to the first dose.o. A measles-containing vaccine administered before the first birthday should not be counted as part of the series. MMR should be repeated when the child is age 12 through 15 months (12 months if the child remains in an area where disease risk is high).
Chlorine tastes and odors are removed. Sediment down to 30 microns in size is also removed by mechanical filtration. The filter is kept clean with a weekly automatic backwash. During the backwash (which typically occurs in the middle of the night) the carbon is washed clean by a 6 to 8 minute backwash and 4 to 6 minute rinse cycle. q. What maintenance is required with these backwashing filters?
1 You may also want to add a high quality algaecide to the water at this point. 2  Run your filter 24 hours a day and backwash 3 or 4 times a day for quickest results. 3  Green or cloudy water will quickly clog a filter, therefore you may have to backwash your filter many times a day until the pool clears. The pool will never clear up if the filter is not working properly 2  ! Once the water does clear up, you will most probably see debris on the pool floor (dead leaves, algae, etc.). 3  If there is only a small amount of debris present, you may want to vacuum it up using your own pool vacuum system.