Individuals with normal color vision will see a number, while those with a deficiency do not see it. On some plates, a person with normal color vision may see one number, while a person with a deficiency sees a different number.
Your phosphate level should be at or below 100 parts per billion (ppb). If your water chemistry and phosphate levels seem to be in check, one potential cause of the cloudiness in your pool could be dead algae. Phosphates are the food supply for algae, thus high phosphate levels promote algae growth.
Now there are more than 30,000 different types of algae. Their seeds, called spores, are constantly dropped in swimming pools by rain, wind, leaves, and other debris. It doesnât take much to make algae happy. Give it warm water, sunlight, and carbon dioxide and it will thrive.