The Industry standard for lowering the pH in a Pool is to use Muriatic Acid. It is readily available at your local pool store, hardware store, and many grocery stores. There are two other alternate and safer ways to lower the pH in your pool and that is by using Dry Acid (Sodium Bisulfate) or Acid Magic (Hydrochloric Acid). I will cover all three methods here for you so you can make an informed decision.

Since the use of Muriatic Acid is well known I will only touch on it briefly here. They sell it in different strengths, but the Industry Standard is 31.45% and you can readily find this strength at your local pool store. Since this is a very strong acid, I suggest wearing gloves when handling it and also you need to be aware of the fumes when you pour it. Also, be careful not to get any on the pool deck as it can stain the surface.

Acid Magic:

Acid Magic is Hydrochloric Acid with the same strength as 31.45% Muriatic Acid but it has some great benefits over Muriatic Acid. Acid Magic has 90% fewer fumes than Muriatic Acid and it has a buffering agent that will protect your skin from getting burned. It also won’t etch the surface like Muriatic Acid and it is a safe alternative or as they say, a user-friendly form of Muriatic Acid.

Here is more about the product from the manufacturer Certol:

ACID Magic is a full-strength muriatic-based product formulated to ship, use, and store easier than standard muriatic acid. This revolutionary blend of proprietary ingredients offers the cleaning and pH reduction of powerful acids while providing increased usability.


• Tested safe in all heated/unheated pools.

• ACID Magic is certified by NSF to NSF/ANSI Standard 50.

• Adjusts pool and spa water chemistry.

• Extremely effective acid wash.

• Cleans filters, chlorine generators, and meter electrodes.


• ACID Magic is certified by NSF to NSF/ANSI Standard 60.

• Corrosion and scale control.

• Descaler.

• pH adjustment.

Dry Acid:

Sodium Bisulfate (Dry Acid) Sodium Bisulfate is a dry, granular form of acid. This makes it safer for handling, and it is far less corrosive in a pump room or other space as it is not a strong oxidizer like muriatic acid. Sodium bisulfate needs to be stored in a dry place, without moisture getting into the container. Sodium bisulfate must be pre-dissolved before being added to the pool, just like any other dry chemical. But if you spill it or get any of it