Contamination is a recurrent problem with paramecia cultures.
To insert it, cut a strip about 2-3 mm wide and about 5 cm long and draw through the tube with a wire hook or tubing with a notch in it. Device for purifying paramecia 2. Sterilize the tubes. Suspend a sterile floss-containing tube in a sterile 60 mm petri plate with a piece of tape. The tape does not need to be sterile.