cohort days_since_fert total_Alk TOC2 PCO2 CO2 bicarb CO3 pH omegaC omegaA temp sal August_trt 0 2792 2373 338 10 2052 312 8.18 7.40 4.94 25 33.0 August_trt 1 2731 2386 433 12 2116 258 8.08 6.13 4.09 25 33.0 August_trt 3 2799 2417 391 11 2119 286 8.13 6.81 4.54 25 33.0 August_trt 5 2890 2525 451 13 2235 277 8.09 6.59 4.39 25 33.1 August_trt 7 2839 2517 520 15 2257 246 8.03 5.82 3.88 25 33.3 August_trt 9 3009 2611 427 12 2292 306 8.12 7.29 4.86 25 32.7 August_trt 11 2713 2369 408 12 2097 260 8.11 6.32 4.21 25 31.1 August_trt 13 2803 2438 418 12 2151 275 8.11 6.56 4.37 25 32.6 August_trt 15 2909 2524 420 12 2220 292 8.12 6.96 4.64 25 32.8 August_trt 17 2815 2447 416 12 2157 278 8.11 6.62 4.41 25 32.8 August_trt 19 2694 2369 455 13 2112 244 8.06 5.81 3.87 25 32.9