The only one so who tested ORP levels so far was RobbyG:
Quote:
Originally posted by RobbyG
The ORP on my tank had been dropping over the last 7 months and I had no idea why. Now I know that the micro Biologics in the Tank had gotten way too high, The 3 days killed off almost all of them and now my ORP is back to between 320 - 400 steady.
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I don't know what his ORP was before the black-out but maybe he will chime in soon.