How do you control humidity?

[o.c.d.]

I installed a inline exaust fan in my attic with two ports in the fish room still waiting on a dehumidistat? Nice thing about them is you can't hear them at all.But 12hr in my attic really sucked. First I use a regular bath fan and it was good for about 2 years then the port locked close and the line filled with water and what a pain. All fixed now just remember the lesson learnt, check outside ports and inside for obstruction. I now have the humidity reading also, I could have wrecked my roof if I hadn't have caught it.