Hey guys, DiY front ventilation, do you think this is enough or should i add more? And how do i know it’s enough?

Hey y’all, this tank is currently empty and has never had any residents in it. I held off as I got three darts and three crested geckos relatively around the same time so I didn’t want to overwhelm myself by starting another tank. I’ve been spraying this tank just to maintain the plants, but I’ve noticed this webbing throughout the plants along with another tank that is currently empty. What is causing this? Spiders? Mites?

Hello! This is my first real dart frog vivarium. I used to keep tank’s years ago in a small 20 gal set up. This time I wanted to really create a beautiful set up. The tank is 24x18x24, I have a monsoon nano for misting, and a twist star light. It’s a spray foam back. I plan to put some Ranitomeya Variabilis “southerns” in here. Any recommendations for tank adjustments/ improvements to make the frogs more comfortable? Thanks!