The TDS meter arrived and I've tested several sources. These are sources and TDS readings in ppm:
Tap: 105
Pur Filter: 114
Poland Springs: 90
Reef water: 390
Fresh water tank: 900
Office tap: 365
Office RO filter: 97
Typhoon: 1
My tap water is pretty good in this measurement, which is surprising. The water from the Typhoon actually reads 1ppm which is pretty amazing. I also received the pH calibration solution and I've been testing pH with the newly calibrated device. It is not as precise as the TDS meter.
I replaced another 7.5g of water today, so far a total of about 20g. Elephant skin seems to be suffering from the same symptoms as the brain before it disintegrated.
www.tdsmeter.com
www.airwaterice.com