I know that most reefers would recommend ignoring ORP, and to an extent, I do ignore it, unless I see a sudden change. I just turned on my UV sterilizer, running at about 400gph on a dedicated pump, and my ORP dropped from 230mV (I know, it's a bit low already) to 170mV. I thought UV would have the opposite effect. Clean water and therefore increase ORP. Any idea what would cause the ORP drop right after I turned on the UV sterilizer?
Thanks in advance for the help!
Thanks in advance for the help!