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Old 11-21-2007, 04:46 AM
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Originally Posted by sphelps View Post
I don't think much of any denitrification processes are occurring in our aquariums, in the ocean yes, but it's just not feasible in the aquarium.
So following along this thought, where did my nitrate go? I'm talking about long running systems never showing detectable NO3, even feeding "well" with PE mysis, daily nori, etc.

I like to believe the rock is doing it, but how does the water reach the anaerobic areas within the rock at sufficient turnover to process the entire tank?
And I'm not certain you need a carbon source with these bacteria, now you're gonna make me have to hit the books again.
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Old 11-21-2007, 04:51 AM
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I'll pose a corollary question then, why do other long running systems, when even feeding "lightly" and lightly stocked, always show trace amount of nitrates (namely my tanks ... or in some cases, show ridiculous amounts of nitrates)?

I'll say one thing about carbon dosing though, 3 weeks of "Polyp Laps Reef-resh" has done what a year of running sulfur could not, and for the first time in well over a year I have sub-10 nitrate readings in my ritteri tank. Wish I knew what the difference was with this tank and its resistance/resilience to denitrification... it's really weird.
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Old 11-21-2007, 04:53 AM
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Tony, does your theory about different rock perhaps come into play here? Maybe your rock is not porous enough?
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Old 11-21-2007, 05:35 AM
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Originally Posted by reef_raf View Post
Tony, does your theory about different rock perhaps come into play here? Maybe your rock is not porous enough?

Brad thanks for a great thread.

Following your thought above. I started to think about this. There are so many places we now get LR from. A lot is farmed line stone. Other Rock is from a dead or deep reef. I'm wondering if the good porous stuff is becoming harder and hard to find.
I have already been hitting the books but have not hit on the article that started my understanding that LR alone does not complete the nitrogen cycle. In a closed reef system.

OK so I wasn't able to dig up anything concrete yet. But I'll be back into the books tomorrow.

J
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Old 11-21-2007, 05:38 AM
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Jason, did you read that link? Ron and Eric are supposedly doing further research, so depending on when that link was done, they may have completed it by now. Maybe I'll try to ask one of them if they have more info.
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Old 11-21-2007, 05:39 AM
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The last few shipments of live rock I bought were crap. Jakarta maybe? I can't remember. All I know is my first tanks with premium fiji were awesome, before I discovered good skimmers even..
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Old 11-21-2007, 05:40 AM
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The last few shipments of live rock I bought were crap. Jakarta maybe? I can't remember. All I know is my first tanks with premium fiji were awesome, before I discovered good skimmers even..
do you see any difference inNO3 with it's use? Or is it combined in existing setups?
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Old 11-21-2007, 05:42 AM
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do you see any difference inNO3 with it's use? Or is it combined in existing setups?
Don't have them anymore Brad, and never had algae enough to want to measure. The tanks I mention were 100% fiji premium.

All I know is that is my rock of choice.
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Old 11-21-2007, 05:40 AM
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Reading now
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Old 11-21-2007, 05:00 AM
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Quote:
Originally Posted by reef_raf View Post
So following along this thought, where did my nitrate go? I'm talking about long running systems never showing detectable NO3, even feeding "well" with PE mysis, daily nori, etc.

I like to believe the rock is doing it, but how does the water reach the anaerobic areas within the rock at sufficient turnover to process the entire tank?
And I'm not certain you need a carbon source with these bacteria, now you're gonna make me have to hit the books again.
Nitrate is removed with water changes but more importantly organics are removed before they break down into nitrates with a good skimmer. Also a refugium can work fairly well at removing nitrates. I really doubt your rock is doing very much, maybe some but very little.
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