DIY Sulfur Denitrator

<a href=showthread.php?s=&postid=13071906#post13071906 target=_blank>Originally posted</a> by Tony Romano
I have a large Midwest - how high can I go on flow and still have anaerobic chamber?

It depends on how much media it's in there.

Check out page 14 before the split for some basic guidelines regarding flow.

HTH,
djfrankie
 
Can you just have straight Sulfur media without the CACO3 media in the chamber? Just for future reference.

My nitrite coming out is down to 2 from 4 yesterday :) so I guess that means I am cycling the reacotr now?
 
<a href=showthread.php?s=&postid=13072178#post13072178 target=_blank>Originally posted</a> by skippyreef
Can you just have straight Sulfur media without the CACO3 media in the chamber? Just for future reference.

My nitrite coming out is down to 2 from 4 yesterday :) so I guess that means I am cycling the reacotr now?

Yes. CACO3 is only used to help bring up the ph in the efflluent. Another side effect of using CACO3, even though is minimal, will be the addition of Alk as the media dissolves.

And Yes.

HTH,
djfrankie
 
<a href=showthread.php?s=&postid=13061983#post13061983 target=_blank>Originally posted</a> by kcress
I found any tests of nitrate out of my reactor to be complete hogwash. Do not bother in my opinion. Measure the tank closely and watch the tank.

My output readings completely baffled me all the time and still baffle me. But my tank went down, down, down, to now; zero.

All along the output was usually measured as substantially higher than the tank. How can that be?? Unless the sulfates or the ph of the output is breaking the tests?

kcress.........Great that your tank is @ zero or near that, but as you must know no two tanks are exactly the same and to say not check out of the SR is really not good advice, even though in YOUR case it seems to have worked.....why ? for one thing measuring Nitrate output, or more important the direction of change is important for any flow rate adjustments to be made and knowing output is also a must to judge impact of the amount of sulfur in there, is it to little or to much.....not knowing Nitrate direction is like flying blind so for my 2 cents your advice is not good for all to follow just you :mixed: :mixed:

Higher results out of SR vs tank is normal and just shows how the reactions going on in there are much more complex than we all orginally thought, and the color interferances are not caused by the sulfur or the sulfates, I used both kits and have varied results using both the LaMotte Nitrite and Nitrate kits with no problems. Like I said just my 2 cents.
 
Just Tested!!!!

Nitrates were way red yesterday on my salifert (coming out of reactor) and well over 100PPM per teh color card! Today they are barely over 1PPM!! Nitrite is just tinged a little pink and might be at 0.1 according to low range! I cannot believe this thing is this efficient at cycling!!!

I am at 1gtt/sec now and think tommorow I should go to 2gtt/ sec and then retest the following day?
 
ZERO nitrite and nitrate on the output side tonight so bumped up drip rate a little and will keep ertesting.

I noticed that the red cyano is starting to disappear from the rocks last night too. I tested the tank Nitrate and it seems to be pulling back just a little. The color is somewhere between the 10 and 25 reading on the color card. I am so happy that I decided to do this!
 
<a href=showthread.php?s=&postid=13082749#post13082749 target=_blank>Originally posted</a> by skippyreef
ZERO nitrite and nitrate on the output side tonight so bumped up drip rate a little and will keep ertesting.

I noticed that the red cyano is starting to disappear from the rocks last night too. I tested the tank Nitrate and it seems to be pulling back just a little. The color is somewhere between the 10 and 25 reading on the color card. I am so happy that I decided to do this!

Good to hear. Just keep that skimmer running clean and keep the carbon fresh. You'd want to pull all those nutrients out of the water as the cyano dies.

djfrankie
 
My skimmer is tweaking right along and I am going to do a water change this evening and change my carbon. I am also slowly taking outthe sand in the tank with each water change.
 
So I had a denitrator that had an eheim 1046 hooked up to it. Seemed a bit low on the flow, at only ~75gph. I put a MJ1200 as a circulation pump, and now there's little pockets in the middle where there's some tumbling going on.

Anyone know what the drawbacks of higher recirculation flow is? What about circulation that's lower (like the 75gph of the eheim)?
 
I did the calcualtions after I measured how fast I am running hte water through the unit. Curently I am processing about 6.5 gallons of tank water a day because the for rate is a little over 1 liter an hour. I have read that these can be running as fast as five liters an hour without detriment. I am slowly ramping up the output daily and testing the next day to make sure that I am not getting nitrates on the output side. Is that the best way to adjust?
 
Increased drip rate this morning after testing and still getting zero on the output side. Tank seems to look better every day!!
 
<a href=showthread.php?s=&postid=13091768#post13091768 target=_blank>Originally posted</a> by skippyreef
Increased drip rate this morning after testing and still getting zero on the output side. Tank seems to look better every day!!

skip...................Excellant results and oh ya thx for the explanation on the FR thingy. Good luck on your project.

Dick
 
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