Richard,
The sprayer works well. However, I think that the screen on the intake inside the tank is INADEQUATE. I definitely would NOT recommend it for any wetable powders. Even for regular miixes I wrap the intake pipe in a sock filed with aquarium filter pads.
But regardless, I think that it is overkill for 2-6 gallons. For that type of spraying I’d recommend something likre
https://www.amazon.com/Hudson-99598-Electric-Atomizer-Commercial/dp/B001FWX3LK
For myself, the 16 gallon capacity proved insufficient. I started using a pressure power washer hooked up to a 30 gallon plastic barrel. See old post below
Mike