Sulfur denitrator

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I see this, but can't figure out how to set it to continuous duty mode in Apex Fusion.

Calcium Reactors: The DŌS QuietDrive now includes a continuous duty mode, making it a great option for a calcium reactor feed pump. It is capable of pushing 11.41 gallons per day at continuous duty.
 

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I do currently have an available Neptune Dos QD head. Is that a viable option or am I better off getting one of these Kamoers?
The did will work fine. Use what you have on hand.
 

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I see this, but can't figure out how to set it to continuous duty mode in Apex Fusion.

Calcium Reactors: The DŌS QuietDrive now includes a continuous duty mode, making it a great option for a calcium reactor feed pump. It is capable of pushing 11.41 gallons per day at continuous duty.
Check the tasks function for setting up a calcium reactor
 
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I am also trying to figure out how much sulfur I need to put in it. I was watching a parkers reef video where he said to start with about 1 liter per 400 liters which would be about 2.5 liters for my 250gal (1000 liter) system.

Judging by the pictures on Pacific Sun's website, the smaller tube is meant for Sulfur media. I can't fit that much media in the smaller tube and they sent more sulfur with the reactor than will fit in that tube.

Should I just fill up the small tube with sulfur and put some reborn in the big tube? Should I fill up small tube with sulfur and put some sulfur in the bottom of the big tube with reborn on top of it?

Edit:
This model is supposed to be for systems up to 2,500 liters.
 

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I would fill up the smaller tube 3/4 full with sulfur, then top that off with calcium reactor media to keep the sulfur in place. Fill up the larger tube with calcium reactor media. Check the inlet and outlet, sulfur goes in the inlet and CR media goes second in the outlet chamber.

I have 6 pounds of sulfur in mine which works well for my 200 gallons. I dont know how many liters that is.
 
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I would fill up the smaller tube 3/4 full with sulfur, then top that off with calcium reactor media to keep the sulfur in place. Fill up the larger tube with calcium reactor media. Check the inlet and outlet, sulfur goes in the inlet and CR media goes second in the outlet chamber.

I have 6 pounds of sulfur in mine which works well for my 200 gallons. I dont know how many liters that is.

The smaller chamber is the inlet and it looks like the recirculation pump is sucking from there. The larger chamber has the output nozzle.

I can fit about 4lbs of sulfur media in the smaller chamber. Should I put another 2lbs in the larger chamber under some CR media?

Edit:
or just start with 4 pounds and add more later if needed?
 

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The smaller chamber is the inlet and it looks like the recirculation pump is sucking from there. The larger chamber has the output nozzle.

I can fit about 4lbs of sulfur media in the smaller chamber. Should I put another 2lbs in the larger chamber under some CR media?

Edit:
or just start with 4 pounds and add more later if needed?
Just start with what you can fit in the smaller chamber. You will know if you need to add more in a few weeks. I think that will be plenty.
 
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Just start with what you can fit in the smaller chamber. You will know if you need to add more in a few weeks. I think that will be plenty.

The Kamoer recirculation pump that came with this thing is insanely loud. I ordered a silicon mat to put under it. Hopefully that helps some.

Right now I am just pumping some clean saltwater through this thing and into a bucket to flush it out a little. At what rate should I set the pump once I start using tank water?
 
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So I put in a ticket with Neptune about the "Continuous Duty" modes mentioned all over their marketing for the DOS QD and they replied:

That's a great question, and I can understand the confusion—especially with the new "QuietZone" and "Continuous Duty" messaging you've seen on our site.

While the DŌS QuietDrive (DŌS-QD) was engineered for quieter and smoother operation, it's important to note that it cannot run continuously 24/7. The DŌS-QD still requires periodic pauses to prevent motor heat buildup, particularly at higher speeds.

Good to know that Neptune straight up lies about their products. Now I need to figure out if I need to buy another pump or if I can have it pushing water through the denitrator in bursts throughout the day.

Edit:
I guess it would probably be ok if I did some math.. Like if I need 10ml/minute. 10 x 60min x 24hour would be 14,400 ml per day.
 
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Screenshot 2025-11-11 152613.png




This is also on the BRS page under details.
 

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Is the Kamoer FX-STP better than the Versa? It looks like the Versa is $100 cheaper. I'm will to pay for quality if the Kamoer is much better.
I would gladly trade my versa for another Kamoer fx-stp. I picked the versa up as an "upgrade" instead of replacing my old Kamoer. When it dies or I get motivated, I will be replacing the versa with another Fx-stp. I found these pumps that I might switch to stenner pump
 

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I would gladly trade my versa for another Kamoer fx-stp. I picked the versa up as an "upgrade" instead of replacing my old Kamoer. When it dies or I get motivated, I will be replacing the versa with another Fx-stp. I found these pumps that I might switch to stenner pump
Stenner are good but noisy, used the duel head for AWC

IMG_1308.png
 
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I would gladly trade my versa for another Kamoer fx-stp. I picked the versa up as an "upgrade" instead of replacing my old Kamoer. When it dies or I get motivated, I will be replacing the versa with another Fx-stp. I found these pumps that I might switch to stenner pump

I ordered the Kamoer FX-STP. Thanks!
 
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I've had it running for a couple of weeks now. The DOS was running at 90,000 ml per day. I switched it over to the Kamoer FX-STP a few days ago and it's been running full bore at 140ml/min.

I haven't tested the affluent yet, but my nitrates have been dropping. NO3 was around 45 when I hooked this thing up and now it is down to 11 and dropping. So far so good.

I bought a PM1 module and another ORP probe for my Apex. I put the ORP probe in the probe port in the top of the reactor, but the probe has been reading 0 since I plugged it in. I'm not sure if I'm doing something wrong or if something is broken. The PM1 port had pH enabled by default. I enabled ORP and disabled pH, but it still reads 0.
 

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I've had it running for a couple of weeks now. The DOS was running at 90,000 ml per day. I switched it over to the Kamoer FX-STP a few days ago and it's been running full bore at 140ml/min.

I haven't tested the affluent yet, but my nitrates have been dropping. NO3 was around 45 when I hooked this thing up and now it is down to 11 and dropping. So far so good.

I bought a PM1 module and another ORP probe for my Apex. I put the ORP probe in the probe port in the top of the reactor, but the probe has been reading 0 since I plugged it in. I'm not sure if I'm doing something wrong or if something is broken. The PM1 port had pH enabled by default. I enabled ORP and disabled pH, but it still reads 0.
You are reeding 0 because the ORP level is negative, which is good. The apex cannot report negative ORP values. You will need to reverse the polarity of the probe to read your negative values as positive values in fusion.

I have a write up on this in the Neptune forums Here
 
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You are reeding 0 because the ORP level is negative, which is good. The apex cannot report negative ORP values. You will need to reverse the polarity of the probe to read your negative values as positive values in fusion.

I have a write up on this in the Neptune forums Here

Fun. I love my Apex and it's embedded scripting language, but man does Neptune continue to find ways to disappoint me.

I ordered some male/female BNC terminals from Amazon and will crisscross applesauce the polarity. I'm having trouble bringing myself to start cutting on my brand new $100 ORP probe.
 

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