@NJBob Now that's an excellent community tank! both Microsorum are huge n healthy either one could serve as a centerpiece specimen in its own tank. Does the Betta harem(?) make bubble nests, maybe even spawn? I had some dwarf Gouramis (another bubble nest fish) .
It appears the Corys must have noticed your camera and are in front center doing their best attention hog routine. They say "plants? Bettas? what's really impressive here is US! and we're cute! zoom in close on US! we're about to frolic! did we mention we're cute?"