I do. It's hard to really clean sprayers between uses, so I have one for each product. They're not expensive to have a few different ones on hand.Do you think mixing up a Neem solution would warrant another sprayer?
I started with regular 32oz sprayer bottles and then moved up to the pressurized pump kind that hold 64oz. Now I've added two 1gallon sprayers, one for citric acid and the other for neem. If I had storage room I'd only use the 1 gallon kind because that wand makes it much easier to spray the plants bottom to top and inside and out.
Each sprayer is labeled with the contents and dilution so I don't have to keep calculating it!