I usually use Dry Acid (which can be expensive) to lower the Ph in my pool because Muriatic Acid (which is easier to find) gives me the Hebe-Gebes. My biggest concern is how to measure the acid and then store the partial bottle.
What type of measuring containers can be used with Muriatic acid. I'm assuming that glass will work, but are there any plastics that can be used?
How long can you store Muriatic and what are the dangers of off gassing once you have broken the seal under the lid (and, yes, the lid is screwed on tight).
Pentair Sand Filter