Spa Marvel Water Treatment & Conditioner 16 fl oz

Algae are microscopic plants that grow in water. They are usually green, but can also be blue-green, black, yellow or mustard. Algae can grow on the pool surface or float in the water. Algae can turn pool water green, which can literally happen overnight.

 You need to shock your pool water when opening and closing your pool. You should also shock treat weekly during the pool season to kill bacteria and algae and remove contaminants. We recommend shocking at the same time and on the same day each week. The optimum time to shock your pool is sundown. At this time of the day, the chlorine can work without fighting the sun’s ultraviolet rays. The pool should be left uncovered after shocking the pool. Shocking after sundown also gives chlorine more time to restore the water clarity.

If this happens, use Poolife® Back to Blue® Shock System, which can restore water clarity in 24 hours. To treat common algae like green and yellow, use Poolife® Algae Bomb® 30, Poolife® Defend+® or Poolife® Super Algae Bomb® 60 algaecides, which, when used in conjunction with a Poolife® shock product, cleans up both green and yellow algae. Mustard and black algae are more difficult to remove, so we recommend using Poolife® Mustard Algae Treatment product or Poolife® AlgaeKill II product. Poolife® has additional algaecides to address other specific needs. Always follow product label directions carefully.

The build-up of cyanuric acid in swimming pool water resulting from the use of stabilized sanitizers in conjunction with stabilized shock products. • Overstabilization will significantly decrease the effectiveness of chlorine in killing bacteria and algae. • Small levels of cyanuric acid (20–50 ppm) do serve a purpose in protecting chlorine from sunlight degradation. However, too much will negate any benefit and cause problems. • Calcium Hypochlorite-based shock products such as Poolife® TurboShock® , and Poolife® Rapid Shock® shock treatments will not increase the stabilizer level in your pool.

 Always add stabilizer before adding Poolife® chlorinators. The stabilizer must be added slowly through the skimmer while the pump is operating.Allow at least 48 hours for the stabilizer to dissolve before backwashing or cleaning the filter.

 The cyanuric acid level and the climate determine whether you need to add stabilizer to your pool. You should take a sample of your pool water to your Authorized Poolife® Dealer for a detailed analysis and recommendation or you can use test strips to determine the stabilizer level. When opening your pool, if you choose to use stabilizer, the stabilizer level should be 20–50 ppm. During the swimming season, the ideal stabilizer level should be maintained between 20–50 ppm. Chlorine isn’t as effective if the stabilizer level rises above 90 ppm. Remember some chlorinators add stabilizer as the chlorine dissolves into the water.