#ed_op#DIV#ed_cl##ed_op#SPAN class=postbody#ed_cl##ed_op#FONT size=2#ed_cl#I was wondering when you use a PH controller with a calcium reactor I know that it will keep the PH in the reator right but can it also control the PH in the tank. Or do you need to buy two controllers one for the reactor and one for the tank. I'm just a little confused on that issue #ed_op#IMG alt="Rolling Eyes" src="http://corareef.org/forum/images/smiles/icon_rolleyes.gif" border=0#ed_cl# If you can get one that controlls both what is a good brand. So any info on that would be great #ed_op#IMG alt=Exclamation src="http://corareef.org/forum/images/smiles/icon_exclaim.gif" border=0#ed_cl# THANKS #ed_op#BR#ed_cl#GOZYK#ed_op#/FONT#ed_cl##ed_op#/SPAN#ed_cl##ed_op#/DIV#ed_cl#