Ok I am building a TBH and putting on a screen bottom so varroa mites will fall out of the hive and to aid ventilation.
my instructions-a pdf download from biobees says to use a screen with 8-10 holes per inch. Is that per square inch or by linear inch?
maybe someone can give me an idea of the type of screen they use and where did you buy it? been all over my little town and can find 1/4 inch hardware wire but really nothing smaller except window screen which would keep those darn mites inthe hive where I dont want them.
since I am new to beekeeping---exactly HOW small a hole can a bee go through.