How can I avoid overwatering the substrate when watering moss poles?

Hi everyone!

I currently have two moss poles, a Monstera adansonii and a Monstera deliciosa, but I feel their substrate is getting too wet because the moss pole drains into the substrate, keeping everything very moist.

These pots with moss poles have been planted for a week, so I wanted to know if I should perhaps change the substrate or something like that.

I'm using this substrate:

1 part black peat moss

1 part perlite

1 part orchid bark

2 parts coconut chips

I'm thinking of changing to something like this:

1/2 part black peat moss

1 part perlite

1 part carbonized rice husk

2 parts coconut chips

2 parts orchid bark

Another thing that bothers me is that all the black peat moss comes out at the bottom of the pot. What could I use at the bottom to prevent it all from coming out?

Thank you for your help. 🙂

(Sorry for the HUGE post).