this difference is ∆P 0 -∆P Abl = 310 ± 70 mbar, while at C Gel = 0.2mg/mL, this difference is 10 ± 4 mbar. Compared to the baseline, ∆P 0 ∼ 250mbar, increasing C Gel reduces the peak size from a 125% increase over ∆P 0 to a 2% increase only. The difference in ablation frequency is similarly dramatic: within the 500 seconds displayed in Fig. , the C Gel = 0.2 mg/mL condition exhibits 23 deposition/ablation events compared to 1 at 0.02 mg/mL. Fig. shows f (C gel ), confirming that higher concentrations have a much higher frequency of ablation. At C Gel = 0.02mg/mL, f = 0.13 ± 0.01 min -1 , while at C Gel = 0.2mg/mL, the frequency is 6.7 ± 1.6 min -1 . An order of magnitude increase in C Gel leads to a 50-fold increase in f . Investigating C Gel beyond C Alg = 0.2 mg/mL leads to difficulties in measurement due to the possibility of clogging. At high concentrations of gel, C Alg > 0.5 mg/mL and C Ca 2+ > 500 mM, the alginate channel clogs either at or directly upstream of the junction, preventing deposition of material in the channel downstream of the junction. As the amount of alginate is reduced from the clogging limit, starting at C Alg ≈ 0.3mg/mL (with C Ca 2+ = 300 mM), the characteristic clog-ablation pattern is seen.