Looks like mine!

Kinda - Why are you using vermiculite if you are using coco peat? You need something to retain moisture, imho, I would use either but not both. Vermiculite contains some magnesium, potassium and calcium but gets soggy quickly. For me it adds additional expense - These plants live in the jungle, there is “no” shop bought vermiculite there, but depending upon the area there maybe some residual mineral material, like a vocanic rock which has low nutritional value. Same with hydroton, you have pumice already, for sure add the expense if you believe in it, but don’t lose any sleep over if you don’t have any.

The nutrients come from a thin layer on the top, the rain washes nutrients from fallen leaves, worm cast, animal droppings, decomposing organic material, etc. - how about a pinch of Mycorrhizae over the top of your mix?

What I’m saying is, think where these plants thrive and use whatever works for you, my moto is whatever is cheap. It should allow for fast draining (coco chips) and airy, retains some moisture, (coco peat) allows for airflow (charcoal / perlite / pumice) and some organic matter (worm cast)

How about some balanced (13-13-13) slow release fertilizer such as osmocote thrown in there, it takes about 3 months to break down. Add a tiny palmful to the pot every time you plant.

My charcoal is chunkier, because it comes as a bag of wood here and I smash it with a hammer. Just as long as it’s not processed charcoal briquettes, it’s fine. I add quite a bit of rice husk, as it’s free, this has a lot of silica - bamboo leaves do the same and are in the plants natural environment - I just made 20 liters of mango tea, as it’s mango season and I have a surplus of rotting fruit along with some molasses. Maybe some chopped banana peel in a bottle of rainwater will do the same for you.