PH monitor

[Doo]

Abe,

you can pick them up from Aquarium Illusion they are 1.50 or 2.00/ pack.

Is the Ph probe going in your tank?
if so calibrate using 2 solutions PH7 and PH10

if going in your reactor the PH will be lower than 7 so you might want to calibrate with PH4 and PH7 solutions...