Yes they do! It’s like airAre you sure thats not bubble algae? Do they blast off with a turkey baster easily?
I seen them only when lights are on.. this is also a fish-less reef tankAre they there when the lights are off? Lights on + bubbles usually means algae is photosynthesizing
I did just add new sand last week. But was live sandThen maybe dinos like PSU said
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