I have been growing Brocchinia reducta since 2010.
I grew this plant in a 50 / 50 mix of turface and peat moss.
For me it seems to take the mother plant 5+ years to produce pups.
When my original plant pupped, I kept 2 of the pups and re-potted them into a 50 / 50 mix of perlite and peat moss.
These are these 2 pups today.
I grow these in a south facing sliding glass door receiving as much sunlight as they can get.
Grown in insufficient light the plants will not form a tight cylinder and not be erect.
My plants could use more light. They could be a little tighter and would turn a golden yellow color.
I water weekly with rainwater. If I run out of rain water I would use reverse osmosis or distilled water. Typically by the time I water again the soil is very dry.
Every other month or two, I will dump water into the tanks of the plant.
Also at the time of refreshing the tank water, I will mist the plant with air plant fertilizer.
Anytime I catch any flies or other bugs that have sneaked into the house, they usually get placed into the tank of this plant.