Our water has a high pH. I got some pH down for hydroponics yesterday and have a digital pH meter ordered that should be here next week. I used the pH strips that we use for the hot tub to test the water from the sink (raw well water). I knew it would be high, so tested only water after it ran through a Brita Zero pitcher. So TDS is 004 right now and the pH color post test was yellow. I have never seen yellow so did trial with the filtered water and the pH down. Still tested yellow. So, noticed that the pH color of sink water is in the high alkaline range, which I knew it would be. But testing the filtered water it is yellow. I have no idea now which way to go on getting the pH right.
FWIW, I have an AutoPot system coming this week. My seedlings are two weeks old, and growing in the grow tent. They are getting filtered sink water and so far look really good. I just need to figure out this pH thing before they transition to the AutoPot system.
Top strip is sink water and bottom strip is filtered water. Second tab from right