Ohhh so it's actually use to clean the water too? I thought was for cleaning the concrete floor of pools and sidewalks etc. I thought chlorine was used for the water. I've never cleaned pools before obviously lol
muratic acid has tons of uses-- rust removal, concrete cleaning, etching various things, balancing pool water, etc etc etc.
but as mentioned above, it's no joke. treat is as you would any other acid, even at fairly low concentrations it can flume off a grip of the nasty so wear your PPE and work in a well ventilated space.