I made some RO water this morning to add to my treated water for a water change. I tested the RO water pH with the API liquid test and it was high, WTF. So I tested pH with the high range test and it too read high. Basically the color of the pH test was bluer than the blue on the chart and the color of the high range test was purpler than the purple on the chart:icon_mad:. This would be higher than my normal tap water.
Is this result from the ph being lower than the API test kit can determine? Maybe cause there is no KH? I am assuming this to be the case but would like verification from those in the know.
This is a new RO unit and I performed the first use 5 min flush without the filter and the 30+ min flush with the filter installed. I even ran water through it for 5-10 min before I started filling my aquarium bucket.