jamesbuf said:...
Last question for Carlo. Where did you get that special connector for your ORP probe that reverses the ORP readings?? Do I still need to do this for my ACIII??
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I've been running nitrate reactors for as long as I can remember. I've done carbon & sulfur and prefer sulfur as I think it's easier. I have ORP probes installed in mine and use negative ORP readings to control the affluent. I keep mine nailed at -170mv.
IMHO I wouldn't even think of running one with an ORP controller. I used to think I could dial them in good but it's nothing compared to setting a specific ORP reading and having it stay there. Above -50mv (going towards positive) and you aren't doing anything, under -300mv and it's BAD, between -150mv & -200mv is pretty optimum.
Carlo