Not enough perlite for my liking.
If you cut those sticks to the right length, melt the ends and stick them to the grating, you can get more height so you can add more perlite.
My tub set up is so easy it's kind of boring, but it works 100% of the time.
1 1/2 inches of perlite
2 pieces of egg crate(light diffuser)
2 tiny holes per long side of the tub up towards the top(I use locking lid tubs, no press n seal)
add bottled water until it touches the bottom of the bottom piece of light diffuser
add eggs and into the inc it goes
That's it, I never need to lift a lid until the eggs hatch.
Of course I do open them, but I never need to if I don't want to.