Don't know for sure as Im new myself. But thats what my bryopsis outbreak looked like early on. Otherwise I would guess its only diatoms. It should go away which mine for the most part did due water changes, snails,conchs and LM blenny. If those little stubs start getting taller it could be bryopsis amongst other things. As for the film at the surface its organic build up. Add surface agitation with a power head or divert filter output. You can also use a 2 liter bottle and fill it up with the opening just below water surface to skim the surface on next water change as well to get rid of some quickly. Nice looking tank too! Very nice. Good Luck
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