Speaking of ORP... I lost my Null Plug so I can't calibrate my probe.... ;FacepalmI blow it away yesterday - normally it would be as much as before the day after - not in this case - there was some very small patches left - and they get a blow today. No cyanobacteria in the refugium. ORP slowly up to around 320 mV as highest.
Sincerely Lasse
Sorry to crash the answer, I use 12% and 2 catalysts in a W in a 200g system, I have no issues at all my ORP is generally 350 ish with no mechanical filtration
If I can crash too... how often do you have to refill, and does yours float to let you know its empty?
I fill it completely and it lasts 6 weeks or so and yes it does float, I usually here it knocking into my sump baffles
I agree, no carbon, no yellow water and oxygenated water, with a tiny constant peroxide doseGot to love when people talk about oxydators, I would never run a tank without them!
Got to love when people talk about oxydators, I would never run a tank without them!
Your 500 figure seems high to me, when you say you have calibrated it a few times, over what time period is this? I ask this as if I don’t calibrate both my ph and orp probes monthly values will drift upwards.Seeing as you are all here (just missing @atoll ) and @Lasse has invited party crashers...
I'm running an Oxydator A with 12% and 2 catalysts in my ~150G/~500l system with plenty of organic waste... and my ORP is consistently well above 500.
I have re-calibrated (GHL) a couple of times and it behaves normally. Starts off low (relative to my normal) and creeps up over a couple of weeks. It fluctuates inverse to my PH (which I have trouble getting up over 8). The dip in this chart of the last week, at 9pm on the 28th, is when my Emerald Crab died.
I'm not sure how much to attribute to my Oxydator actually, because I don't see that an immediate impact when it runs out. And I'm sure there have been times when a few days to a week has gone by with it empty.
So anyone have thoughts on this? I know that ORP isn't a number to chase, is of debatable use etc etc. But from everything I've seen these numbers are very unusual. Any idea why this would be the case for me? Is there a number at which I should become concerned?
Cheers, Tony
Got to love when people talk about oxydators, I would never run a tank without them!
I was waiting for you to add this comment! If I had a nickel for everytime I've seen you post your "oxydator endorsement" I might have enough to buy some stock in an oxydator company.
500 mV seems to be rather high - have you seen any disadvantages to your corals? IMO - the placement of electrode probes can effect the measurements. I have mine in a high flow area - I.e. the return flow just pass through them. For the salinity probe - it make difference.Seeing as you are all here (just missing @atoll ) and @Lasse has invited party crashers...
I'm running an Oxydator A with 12% and 2 catalysts in my ~150G/~500l system with plenty of organic waste... and my ORP is consistently well above 500.
I have re-calibrated (GHL) a couple of times and it behaves normally. Starts off low (relative to my normal) and creeps up over a couple of weeks. It fluctuates inverse to my PH (which I have trouble getting up over 8). The dip in this chart of the last week, at 9pm on the 28th, is when my Emerald Crab died.
I'm not sure how much to attribute to my Oxydator actually, because I don't see that an immediate impact when it runs out. And I'm sure there have been times when a few days to a week has gone by with it empty.
So anyone have thoughts on this? I know that ORP isn't a number to chase, is of debatable use etc etc. But from everything I've seen these numbers are very unusual. Any idea why this would be the case for me? Is there a number at which I should become concerned?
Cheers, Tony
I’ve found placement to be really important, since buying the ghl measurement cell, and putting my main probes in it, my measurements have become far more consistent..
