<a href=showthread.php?s=&postid=11574242#post11574242 target=_blank>Originally posted</a> by bluewatercandy
Where do you purchase a Ph probe port? I have an older Geo reactor and it does not have one. I measure the Ph in a cup fed by the reactor drip. This cups Ph tends to be .2 to .5 higher than the actual Ph in the reactor. I think an in reactor Ph reading would be much more accurate for my setup...
