P(L > l) does not depend strongly on φ . This can be seen at fixed ∆P = 1000 mbar (see Fig. in SI). The curves for P(L > l) significantly overlap for all five values of φ examined. The formation of relatively short clogs (l < 100) is equally likely for all φ . However, differences are observed beyond l = 100. Clogs grow longer in dilute conditions (φ = 0.005%) compared to more concentrated cases (φ = 0.10 and 0.25%).