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- With larger grain sizes, the setup builds up pressure and causes overflow of water level into the pressure sensor tubing.
- Need to add another feature features to the setup to run experiment with larger sand sizes such as Sand 30 (0.84 - 0.59 mm) and Sand 20 (1.18 - 0.84mm).
- Need to expand the current hole size on the bottom of the bubble collection container to relieves some potential pressure buildup in the setup.
- Need to collect data and retest grain sizes with the improved setup.