If it is just a wading pool dump the water out and let it dry in between use. They don't hold much water anyway since it is just a wading pool right?
It is called black algae. Your pool supply company can provide the proper chemicals to treat it.
you kill the algae
Algae
Sloths .
algae. you need a sanitizer to keep it from growing!
Feeding
The two main chemicals that promote algae growth are nitrogen and phosphorus. These nutrients are commonly found in fertilizers and wastewater runoff, leading to excess nutrient levels in water bodies and promoting algae blooms.
It is not recommended to enter a pool without chemicals as they play a vital role in keeping the water safe and clean from bacteria and algae. Chemicals such as chlorine help to sanitize the water and maintain proper pH levels for swimmers' health and safety. Without these chemicals, the pool water can become a breeding ground for harmful microorganisms.
algae growing off of it supplies it with stuff to live and the algae gets help too:)
algae growth.
nitrates. they feed algae.
Plants and algae can produce a slimy substance in a lake. Blue-green algae is the most dangerous type of algae for a lake to have because it can produce toxins.