Discussing nitrate reduction

Mels_Reef

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I am at a point in my 8 yr old, 200g SPS dominant mixed reef that I need to find an easy solution to reverse the escalating no3, but also decrease water changes.

Currently my po4 is steady between .06-.12 and my nitrate is drifting upwards of 13-17 depending how much of a water change I do weekly. I use Hanna test meters and have confirmed their accuracy with multiple ICP test results. I test about 2-3 time a week. I am nowhere near a dangerous level of nitrate but I want to have a reliable consumption technique established soon, in order to decrease my water changes. Salt mix has become way too expensive for that to be an economical solution for NO3.

I run all the typical equipment but do not have a refugium. I do have a 1.5lb bag of zeolite media in the sump. I rinse the media once a week during a water change to prevent detritus build up but don’t do anything other than that with it. Nothing else out of the ordinary besides 80mL Balling in my BRS 2 part + Part C. I started the Balling hybrid method about 2-3 weeks ago. I haven’t noticed any effect, good or bad, on my nutrients (or pollution as I like to think of it).

I have tried carbon dosing (via NoPox) a couple times and both times I lost a lot of acros and some fish started having strange infections (bacterial I am assuming). I ended up losing 2 of 3 of those fish. The third fish, that had a strange mouth infection, recovered once I quit dosing NoPox and had about 4 water changes under the belt. So, needless to say, I am not a fan of carbon dosing and more specifically NoPox. Are all carbon sources as toxic to acros as NoPox has been for me?

I have also run a sulfur denitrator in the past and over time my sulfur levels went “critically high” on icp tests and I started losing acros so I don’t want to go that route again. However, I still have the denitrator reactor and have been wondering what would happen if I ran the reactor with calcium reactor media and a tiny bit of zeolite media instead of sulfur? My thinking is an anaerobic environment is what the recirculating reactor is creating and any media should propagate nitrate consuming anaerobic bacteria? What are your thoughts on this @Randy Holmes-Farley ?

I’d also like to get some feedback from SPS keepers on how they maintain 10-15ppm nitrate without killing your more sensitive acros? My goal is to bring my water change schedule down to 15% every 3-4 weeks (since I am utilizing the balling trace element dosing) instead of the current 10-12% weekly that I do now.

Thanks everyone
Mel
 

Minifoot77

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Following but I hope once I get cheato again my nitrates won't be a problem
 
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Mels_Reef

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Following but I hope once I get cheato again my nitrates won't be a problem
Ive also tried macro algae in the past and all it did is create a complete mess in the sump and not have much of an effect on nutrients. Maybe the amount of space in the sump wasn’t enough for the algae to make a difference in my numbers? I’ve considered setting up an attached stand alone refugium. I am just not wanting to add that much expense or equipment.
 

Minifoot77

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I have a 40 breeder and my macro chamber is about 18 to 20 inches of the length of it... and i am running a 65w red grow light at 100%
 

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Mels_Reef

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Definitely worth a read and trying out.
https://www.reef2reef.com/threads/poor-mans-nutrients-control-donovans-nitrate-destroyer.302685/

I would make some slight modifications, like using a versa dosing pump (or any continuous duty pump) to control the flow through the reactor.

It sounds like the denitrator reactor with the sulfur component.
Yes, that thread is what got me brainstorming. However it utilizes carbon dosing.

I’d need a more thorough explanation of different carbon sources and why they would do better with sensitive acros than NoPox. As I stated on the original post, NoPox was poison to my system
 
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Mels_Reef

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I have a 40 breeder and my macro chamber is about 18 to 20 inches of the length of it... and i am running a 65w red grow light at 100%
I may have to revisit a larger refugium with clean macro. I just don’t want to go that route if it’s avoidable.
 

Minifoot77

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Yes, that thread is what got me brainstorming. However it utilizes carbon dosing.

I’d need a more thorough explanation of different carbon sources and why they would do better with sensitive acros than NoPox. As I stated on the original post, NoPox was poison to my system
Why do you think nopox was poison?
 

Minifoot77

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I may have to revisit a larger refugium with clean macro. I just don’t want to go that route if it’s avoidable.
Abe (coral euphoria) has a bucket fuge video on youtube I believe
 

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What's the exact science behind carbon affecting acros besides perhaps dropping nitrate levels too low? First I've heard of carbon being an issue and never had acros therefore more inquisition than solution being offered.

Does NoPox have unnatural ingredients that could be causing issues considering carbon is natural and tanks tend to be carbon limited.
 
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Mels_Reef

Mels_Reef

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Why do you think nopox was poison?
Because it discolored, then killed many acros after dosing it for about 3 weeks. I tried it twice, 8 months apart. As stated in the OP, even had weird bacterial infections on 3 fish that I had had for years. I was even dosing it at 30% the recommended dosage for my tank size.
 
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Mels_Reef

Mels_Reef

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What's the exact science behind carbon affecting acros besides perhaps dropping nitrate levels too low? First I've heard of carbon being an issue and never had acros therefore more inquisition than solution being offered.

Does NoPox have unnatural ingredients that could be causing issues considering carbon is natural and tanks tend to be carbon limited.
I don’t know, that’s why I am looking for more scientific explanations of the different carbon sources people use. I just know what happened when I dosed NoPox. It killed acros in my SPS system. I Never bottomed my system out on no3, I def know better than to go below 5ppm.
 

Pntbll687

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Yes, that thread is what got me brainstorming. However it utilizes carbon dosing.

I’d need a more thorough explanation of different carbon sources and why they would do better with sensitive acros than NoPox. As I stated on the original post, NoPox was poison to my system
I imagine you can use it without carbon dosing as well. You'll still get bacterial growth and denitrification, it may not be as drastic when using a carbon source.
 
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Mels_Reef

Mels_Reef

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I imagine you can use it without carbon dosing as well. You'll still get bacterial growth and denitrification, it may not be as drastic when using a carbon source.
Ya, I like the more moderate/conservative approach because of my history with carbon dosing.

As someone stated above, I think it would then resemble a sulfur denitrator without the sulfur media. I’m thinking that is probably going to end up being my “go to” to try. I just want to hear from Randy about the chemistry of the denitrator without the sulfur media and any potential chemistry issues that may arise as a result…
 

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An algae scrubber like a santa
Monica surf 2x or surf 4 would be stronger at reducing nitrates than cheato and take up 1/4 the space. It also is self contained inside a box, and algae will not leak out. Algae scrubbers are also a natural method of carbon dosing

I run scrubbers on all my tanks in the last 10 years and have not done water changes in that time. I do replenish trace with all for reef or various products as needed
 

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