ok, a few questions then. Those reading are with the co2 always on. Why do i need my pinpoint ph controller then? or can i just use a ph monitor. Prob going to answer my own question here, but...the .2 swing in ph is that ok, or is that why i hook my kalk reactor up to the monitor so it can keep everything more stable(smaller ph swing) . If so, what do i set the high and low for on the controller, assuming i leave the ph probe in my effluent container ?
oh and yes it is using ARM media.
thanks for all the help also................

checking alk now