Silly rack question

Just got my ap rack up and I was wondering...do I need to add extra air holes to my tubs or is the tiny gap sufficient?

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It kind of depends on where you live and what you prefer. I added some holes, but know plenty of people who don't.

I had to add holes or my humidity will be steady at about 80%

If you are talking about just oxygen then yes the gap is sufficient.

However, if you notice the humidity is constantly too high leading to excessive condensation you can drill a few holes in order to get more air circulation.

On the flip side if the humidity is usually at 50% or lower you may want to leave it with just the gap.