I just received my AP-1 TDS meter with calibration fluid. I calibrated it to make sure all was good (was off a little). So here is my question. What would you use?
RO water was 4ppm
RO w/shrimp mineral supplement was 180ppm
Right out of the faucet was 126ppm (measured 3 different days).
Do I save money and hassle of using RO water/mineralization and just use my tap water? Or keep using the RO water? Thanks