I discovered that my substrate, Fluval Stratum, would lower pH after I got the dry start going and thought I could just raise it with CaribSea aragonite. I've had the aragonite (1 cup in mesh fabric bag) in the water since I flooded it 2 weeks ago. My pH is always 6.0!
I've been getting a reading of 7.2 in my betta's planted 3.5 gallon, so I'm pretty sure the test solution is okay. My water comes out of the tap at 7.4
co2 (Fluval 20g kit)
Fluval Stratum Substrate
pH reading at 6.0 (liquid test)
KH and GH at 0-50ppm
Thank you for any help!