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(A) Water collector. The funnel with attached tube was used to plug the drill hole, collect the emerging water, and estimate the flow rate of the springwater. Bar, 10 cm. (B) Biofilm trapping system. Frames covered with polyethylene nets (arrow A) were arranged within a plastic tube (diameter, 17 cm; length, 35 cm) (B) and fixed with a screwed-frame construction (arrow C). Bar, 10 cm.
