Hi guys!

So, I've set up my vivarium now, its all live plants, screen top, half water-half land, waterfall, piece of wood and large pebbles as a base.

I put in the analogue hygrometer and it keeps on changing. Sometimes its 90% and sometimes its %60.

The plants i have are: 1 bromeliad, 1 lucky bamboo, 1 snake plant and another i can't think of.

So, im just wondering, is it ok if the humidity is high and how could i lower it down?
Im getting 3 whites tree frogs soon and need to fix this problem.

Thanks!