We need about (10) spray bottles to seriously get rid of the CBZ fungus and bacteria around here.
I say do it at least 2-3x / year for a good solid preventive maintenance need.
What say you?

I've got a prayer on my desk. It says, "Dear Lord, I pray that my place will never be with the cold, timid souls who do not compete yet criticize, for they never know or feel success or failure."
~ BoB Stoops