smart controller ph calibration

[txreefer]

@rvitko I finally got my tank running and was going to calibrate the ph probe. But I says it requires 5 and 7 or 7 and 9 ph solution. I have the stands 4 7 and 10 solutions. Is it ok if I use them? I haven’t been able to find 5 or 9 anywhere. This seems to be uncommon.

 

[rvitko]

You need 5 and 7 or 7 and 9, we use that standard as it is a tighter calibration to aquarium ranges, you can order it on Tunze.com, but it is not proprietary and is available from other lab suppliers.