Parasitic Plant Aficionado
Trace elements are useful in such tiny amounts that they are often available even when you think they wouldn't be.
Absolutely that is why you got to add 60% perlite 20% vermiculite 20% fluval Stratum and 10% sand. I had given away my recipe many times. My cephs are many years old and I just feed them frog bites one a month or 1 every 2 months. I change medium once every 6 or 7 years.I think there's still a concern with a carnivorous plant missing out on some trace nutrient. For example, if you plant in pure perlite would this plant eventually end up with a boron deficiency? Such a deficiency wouldn't really be noticeable until one day the crown just dies, but isn't something you get from insects as far as I know.
In the wild don't cephs grow on a rocky cliff beside the ocean? I'm imagining there'd be some salt spray from the ocean, and possibly a lot of trace minerals in the clay and ocean spray.