Ok... I'll try and sort this thanks....So essentially it's worked so far because you've been lucky. Eventually it'll lead to fun stuff like root rot too. Itll get out of control and wreck your plants.
You're purposely leaving an easily fixed glaring flaw in design that nearly all of us have experienced some ill effect from. I had transparent blue tubing on my system and halfway through my first grow it wasnt transparent anymore. I got rot and almost lost everything.
I leave a beach towel over my external barrel because the top ring where the top is cut get all kinda slimy and gross just from the basement lights.
Just to be clear though are you talking root rot or bud rot or both?