Where should I keep Nitrates for the best SPS color?

This might help people a bit... I've been dosing some sort of nitrogen source for over a year now and feel it had been a good move for my tank.

http://reefcentral.com/forums/showthread.php?t=2346718&highlight=potassium+nitrate

Peter can you elaborate on what the exact effect is on your Acropora? I presume deeper/stronger colours? - Meaning it wont make ones acropora colour up, but rather make a difference to colours already present? Or none of that at all?
 
Do i have to worry about the potassium levels at all with this? I'm always around 400 with no supplements.

In short, no. Unless you dose ALOT of nitrates. 2/3's of the solution is nitrates. If you pump up your nitrates to 1ppm that basically corresponds to a .5ppm bump in potassium. Pretty negligible...even dosing every day as your system will consume as much if not more.
 
Peter can you elaborate on what the exact effect is on your Acropora? I presume deeper/stronger colours? - Meaning it wont make ones acropora colour up, but rather make a difference to colours already present? Or none of that at all?

Deeper darker colors, I struggled for years to keep certain corals from being pale and dull when I didn't do water changes weekly. I also had a lot of problems with mesenterial filaments and stress reactions during feeding. Things would get especially bad when I went on vacation and the fish weren't fed as much or as regularly as I fed them. Dosing a nitrogen source seemed to have solved this.

However, recently I've been having similar issues with keeping my PO4 levels detectable and having similar reactions from corals. Whether or not this relates to my dosing nitrates is yet to be determined, but I feel pretty strongly there is a link.
 
Peter if I understand your post correctly, in the thread that you linked, you increased you Nitrates by 3ppm in one dose? Was your system starting at 0ppm?

Could you elaborate on your dosing regimen?
 
I was starting below .5 ppm according to Red Sea.

Yes, I increased all in one dose.

My dosing regimen is I'll toss enough nitrogen to boost by a few ppm when I feel like it might be time to do so and test nitrates every now and then. It's been remarkably sporadic, unpredictable and unscientific thus far.
 
Just tested nitrates and took a few topdowns. I have some corals that are refusing to color up, so I suspect not all acros respond to high nitrates in the same way.

PO4 0.05 (salifert)
Nitrates ...

bZ7NRK.jpg


Miami Orchid
poUk1k.jpg


subulata
Tczco8.jpg


Under LED the coral above had a lighter green skin and striking violet/blue polyps. Unfortunately I did not test nitrate when it had those colors.
Sw5uOo.jpg
 
Mark you're kind of high there. Looks like your 50ppm + on the no3. What are you using to test po4?

Salifert, high rez (double everything). I did a 10% water change right after testing and I plan do do another tomorrow or Tuesday. ProdiBio hasn't worked for me yet (ending second month) and an algae scrubber I'm trying out just now has some algae on it.

I'm just not too worried about it at the moment. :D
 
Good thread ! :hmm5:

my target of nutrients is 0.5/0.03 ppm (no3/po4) on salifert kit under my system.

Coral's color & growth and Algae of glass & rock are all good at this level of nutrient.
 
So a few more pics from today. These are all at 30, 40+ nitrates.


za2Iss.jpg


SSC
kRR44y.jpg


But here is the UC Rainbow Milli. In this case rainbow is purple and brown.
tBpKGa.jpg


I'm guessing that lower nitrates would color some of these lighter, maybe faster, and maybe some simply won't show full colors until nitrate is lower?
 
One of the primary things I am trying to understand is carbon uptake by zooxanthellae. Do they use organic carbon, or inorganic (e.g. CO2). Also, do they get it directly from the water column or from it's host coral.
Carbon is the number one nutrient needed by most living things (apart from H an O of course, but that we have plenty off :) For a bacteria the ratios are roughly: (20:14:3:1:0.2) C:N:P:K:Fe.
Thanks for your post! :hmm5:
I want to get reference of your comments about C:N:P:K:Fe ratio. plz
 
Don't remember the exact link. Just check wiki e.g. "composition of a bacteria" or "composition of a human body". We are all not that different:) carbon is always no1 and nitrogen is no2.
 
So a few more pics from today. These are all at 30, 40+ nitrates.


za2Iss.jpg


SSC
kRR44y.jpg


But here is the UC Rainbow Milli. In this case rainbow is purple and brown.
tBpKGa.jpg


I'm guessing that lower nitrates would color some of these lighter, maybe faster, and maybe some simply won't show full colors until nitrate is lower?

I would trade you these colors for mine!
 
I have very good colours and my nitrates are undetectable, I don't have a fuge or carbon dose just natural filtration
 
I did the same thing, 101g/l for a 1 moler solution. Roughly 18tsps of kno3 powder if I remember correctly.

I'm confused...what is a moler? I'm not a scientist or biologist, can you explain the ratio to make a solution for dosing? In easy terms please :-)...I am highly interested in using this, just want to make sure I do it right! Thx
 
I'm confused...what is a moler? I'm not a scientist or biologist, can you explain the ratio to make a solution for dosing? In easy terms please :-)...I am highly interested in using this, just want to make sure I do it right! Thx

Yeah, a mole is a base unit in chemisty...kinda. Anyway, if using KN03, 1 molar solution is roughly 101g which is roughly 18 tsps.

Step one - mix 18 tsps of stump remover with 1L of water

Now we need to figure out how much to dose for a desired PPM.

Lets set our variables as gallons of water and target N03

Step two- convert gallon to L, 100g is 378L

Step three-multiply target ppm of N03 and multiply by Liters of tank water


So if we have 2ppm target N03, multiply 2 by 378L to get 757mg of No3 desired

Now stump remover is only %61 KN03. Hence 1 mole of N03 is roughly 61mg.

Step four-divide desired N03 by 61

This gives us 12.411mg of Kn03 required to raise 100g to 2ppm. Since we have previously made a 1 molar solution, this now corresponds to 12.411ml of solution to dose to 2ppm.

Hope that helps
 
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