discusboy

Hello, Has anyone out there used the above product ? This is the first time I have used one of these but I am not finding it very accurate. I have gone over the instructions multiple times. I used it for a week before I added co2 to my tank, two weeks total and no change in indication. My ph and kh are definately showing changes using separate test kits, but the indicator dye in the Sera kit is still showing the same color, blue. Anyone have any comments.

Thank you for all your replies. HAVE A GREAT WEEKEND everyone

Hello Everyone, Can anyone please tell me where they have their CO2 cylinder filled in the Calgary area ? Your help would be most appreciated.