Can anyone tell me where to buy muriatic acid and if there is a certain name we should look for on the label? We have a Home Depot, Ace Hardware and a couple of other hardware stores (no Lowe's). We also have some sort of pool store that I've only been in once to buy polyquat. We have about a 5000 gallon above ground pool (more info in signature) that we are about to fill and our fill water pH is about 8.0. How much muriatic acid would we need to buy? Thank you!