Dear all,

I'm about to perform fumigation by using paraformaldehyde to react with potassium permanganate. In the procedure, it is stated that 60%-80% of humidity should be reached in order for paraformaldehyde vapor to penetrate more efficiently, and it is written that 2 water buckets are used to generate humidity... I wonder that just placing 2 buckets of water can generate humidity enough? or could anyone suggest for other methods to generate humidity. Thank you :)