That sounds logical. I will increase the Turface trees watering schedule.
Watering is a very personal thing. From your timing to your technique to your yard to your zone, it all plays a role. I was thinking about your issue this morning while I was watering.
I like to add coarse inorganics (I use haydite) to promote root ramification. The rough edges abrade the roots and they reply by splitting their growth in more than one direction. An all-organic mix, in my opinion is too soft to promote the types of roots I want to see in a bonsai tree. More root ramification means more root surface area. So the inorganic component is important to me.
If your 50/50 turface mix appears to be less than ideal for your bald cypress in your yard using your watering techniques, I'd recommend going 30-40% turface and the rest inorganic.
To clarify our terms:
When you say "pine bark mulch" do you mean exactly that? I use soil conditioner. You're in Florida, I see. You should be able to get it there. Soil conditioner is a smaller grade of pine bark mulch. The particles are less than 1/2" in size. Most of it is smaller than that. A 1/4" screen would allow nearly all of it to pass through.
What I call "pine bark mulch" is what I bought from the same company that manufactures my soil conditioner. The mulch was mostly big fibrous bits and chunks of bark. No use as a bonsai soil component.
I bought three bags of that stuff thinking it was the right stuff. Stuck with it, I found a use for it. Some of my trees are in nursery containers growing in bonsai soil. I used to use screens to keep the bonsai soil from rinsing out of nursery pots. Now I use the pine bark mulch. The mulch is great for the bottoms of nursery pots. Just enough to block the large holes and I don't even have to cover the entire bottom of the pot. It drains great and the bonsai soil gets in there to fill most of the air gaps without a significant amount falling out of the pot.