Little bubbles rising to the top of dark liquid with larger ones in the back MACRO

Background, Experiment, Nature, Water, Surface, Detail, Clear, Science, Closeup, Macro, Research, Deep, Air, Dark, Under, Overlay, Climate, Round, Liquid, Sparkle, Cross, Top, Nobody, Rise, Bacterium, Back, Extreme, Bubble, Large, Layer, Change, Chemistry, Laboratory, Biochemistry, Reaction, Pressure, Ascending, Many, Little, Aqua, Trap, Depth, Leak, Nano, Condition, Thick, Mixture, Immersion, Reagent