Bugs will always be a problem if you arent carefull about a few things.
Any gaps can allow bugs in
Unscreened intakes
Pets allowed in your grow rooms NO NO NO
YOU
never enter your grow rooms when you just come in from outside, if you HAVE to then a wash or shower and change of clothes should be done.
Hydro is alot less susceptible to bugs but you can still get them.
Weekly grow room cleans with 10% bleach solution.
J