How does a saltwater pool get sterilized?

If one wants to top up a tank of muriatic acid should one first add the water or concentrated acid? Is it possible and wise to use spray foam insulation to sound-insulate a hollow plastic rubbermaid shed used to house pool equipment especially the filter pump? Is net surfing beneficial? What is the river flowing from lake Winnipeg to hudsons bay? What is the name of a strong current? What scuba depth is safe without a stop in case of emergency? What does wet head mean? In scuba diving what is a bender? Why nitrogin bubbles in scuba diving? What measurement you need to find a swimming pool? How do you clear a head cold before scuba diving? In New Mexico whenever a person on water skis or other towable water device has fallen down or is waiting to be picked up a person aboard the towing vessel must do what? How can you improve suction of your swimming pool vacuum? How do you test an inground pool pump to see if it works without water in the pool? What are the measurements of the poles of an aqua slide and dive queen size slide? Will a black tarp cut in a circle and connected to floating tubes on the outside of the tarp heat ones small pool In hopes to catch the heat rays as they are bouncing out of the pool? Who is mariel enriquez? Are there stingrays in Hawaii? Do pelicans live on land or water? If the force of gravity on a scuba diver is 600 newtons what should the buoyant force be if the diver wants to descend?