Nice tank! I'm also an aquarium enthusiast and all my tanks are heavily planted. Plant love runs deep and cross hobby.
My anubias grow like weeds, but I usually only see 1 or 2 blooms a year amongst all my tanks. Like most "aquarium" plants, they often grow emersed (not covered in water) for all or most of their lives in nature and rarely bloom when grown fully submerged in water.
I admit, I didn't read most of the thread, but you can probably tell from the blooms that they're related to peace lilies. The blooms are practically identical, at least superficially.
My favorite aquatic blooms, though, are the crypts. Like anubias, they are usually reluctant to bloom when fully submerged, but from time to time, they reward me with flowers.
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