Aquarium pH-lowering solution

If you let your crystals dry overnight, then find your safety glasses again and put them on. Take about a quarter of either the wet or dry acetylsalicylic acid crystals and place them into a glass container that can be used for warming. The dried crystals are very fluffy and should be handled carefully so they do not scatter. Take the bottle of aquarium pH-lowering solution recommended for purchase in the Shopping List and Solutions, and add it dropwise until the entire sample of acetylsalicylic acid is com-... 

---