Ok I know I got an answer on another thread. But here is a few things i found out.
Qouted from Eric Edelman
"ORP is Oxidation - Reduction Potential. Completely simplified, it is the likelihood of, or driving force behind, these REDOX reactions occuring
The first question usually asked is, "What should my ORP values be?" The answer is that they shouldn't really BE anything. ORP values vary from tank to tank, and they even vary within one single tank. The best indication ORP is the trend that they have, that is where all the important obtainable information is. Some general ideas, or rule of thumb, on where your ORP value should be. 200 mV is pretty low. 500 mV is pretty high. My own personal tank ran at around 375 in midafternoon. When it dropped to 325 or so, I'd clean the skimmer out, and the ORP would rise again in a few hours. Good skimming is the BEST way to maintain solid ORP values.
Things that lower ORP: Dysfunctional Skimmer, increased biological reactions, poor gas exchange. Things that raise ORP: Good skimming, a few chemicals, good gas exchange, photosynthesis. One general trend to look at is that ORP rises when the water becomes rich in oxygen. We can enrich our tanks with oxygen through vigorous protein skimming and photosynthesis. Those are relatively "natural ways" to increase your ORP value"
LOL it only took me a month to understand what I have been reading. Is ORP a decent way to monitor water parameters? I mean if this drops are raises a significant amount. I can assume that one or more of my other parameters maybe out of wack?