I'm still a novice with Catasetums, since my first one is a saccatum I only just got last year from Ecuagenera.
For what it's worth, I used a liquid fertilizer at around 200 PPM every time I water, but the plant actually receives probably quite a lot more than that since I also squeeze 2-3 drops of pure fertilizer on top of the medium once a week before I water, and top dressed with a Jobe's plant food spike that I cut up into thirds. The newest pseudobulb is twice the height of the one that was already present when I bought the plant, so I think I'm doing something right.
Small salt crystals actually started forming at the top of the medium which was a first for me.
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