So i finally found my PH meter manual which tells me how to calibrate it, and i gotta say i should have had this shit done the day i started germinating my plants, the water i have been watering my plants with came in at 4.5-4.7, i don't know how this is possible i was under the assumption that pure water which RO is supposed to be should measure about 7.0, so i checked the TDS and its less than 5 ppm, i guess the lesson here is never assume always test. I guess now the real question is which is better watering now and risking over watering or letting the plants set in the wrong PH water for the next 12 hours, and what do i do if the cotyledons fall off...