I'd like to switch from Muriatic Acid to a dry acid so my wife will be able to manage the pool if for some reason I am not able to. Are there any downsides? Is sodium bisulfate the only form of dry acid? In the event of an extended water outage would the sulfates affect the potability of the water in the case of having to drink it (after filtering through something like a Big Berkey or Sawyer filter)?