So I finally got tubs for my 2 bps ... just using the regular UTH at this point no flexwatt and they're sitting on top of a desk.. no time or money to make a rack as of now... I have read a lot about putting holes in the containers so I need expert advice on:
Where they should be?
How Many?
How big?
How far apart?

my apartment is set at 72 and I live in Los Angeles (for an idea of temp/humidity)

My tubs are 32qt Sterilite. (Ignore the one in the middle that's a hatchling one that I haven't set up... just have to be ready in case I decide to get a baby last minute )
Pictures are below:





Also... Please include HOW to drill the holes... I have read about burning the holes and also drilling.... I don't have a drill so any other options would be ideal (although I can probably borrow one from someone).... Your help is much appreciated!! Thanks

(the tank underneath in the picture doesn't have any animals in it so please ignore it lol)