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How do I get my Nitrates down


raeh1

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Water change....

There are charts on RC about this. But you will need to do approx 18 50% water changes to get the Nitrates down from 50pp to under 5.

So although a water change is always a good idea, 1 minor water change has done very little.

Stop feeding the tank frozen food completely and reduce feeding overall. Remove any bio balls and filter wool and sponge filters anywhere in the system.

Is the tank over stocked and under skimmed? Crank up the skimming or add a bigger skimmer or remove stock.

Got enough rock for the size of the tank and its stocking level? Add rock, to the sump or the display.

How old is the tank, is it still cycling (e.g. is it under 9 months since setup? If so, then what did you expect?).

Pie

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Hi Raeh1

I saw somewhere that you were looking for an anemone. Can i suggest that you dont put it into your tank until you sort this problem out? You will be wasting your money as it will not last long with water chemistry issues such as this. Good luck.

Pies is right - definitely get rid of any bioballs and/or canister filters (if you are using them) as they are nitrate factories.

Are you over-feeding ?

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Remove any bio balls and filter wool and sponge filters anywhere in the system. Pie

Can they all be removed at once or do you have to do it slowly to avoid shocking the tank? When I finally removed my trickle system, I believe someone (LFS??) told me to take out the bioballs in fourths, or something like that.

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Can they all be removed at once or do you have to do it slowly to avoid shocking the tank?

No you should not remove at once as you could get ammonia problems due to removing you bacteria.

Best to take a handfull a week out.

Bioballs dont cause nitrates. the dirt that gets trapped inside the bioballs does.

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The tank has been going 14 months.

I have about 100 kg of live rock.

I think I will cut down my corals.

Skimmer is a deltec and removes heaps.

I will cut down my feeding levels. This maybe the problem.

I did not end up with Bio balls in the end.

I also have now changed my filter wool.

Thanks for the advice guys.

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I think I will cut down my corals.

???? on the contrary, INCREASE the number of corals. more corals the better as they compete for nutrients against bad algaes. if anything reduce the number of fish.

I will cut down my feeding levels. This maybe the problem.

very likely if you overfeed, feed as much as fish consume within 2 minutes, no more. make sure no food goes uneaten. turn off powerheads when feeding.

I also have now changed my filter wool.

VERY likely to be a source. i use filter wool once every 2 months for only a few days at a time, simply to remove crap floating in the water column or when i stir up the sandbed.

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The nitrates have dropped overnight to 60 ppm.

I am getting 60 litres of sea water this afternoon. (luck I surf aye).. Two trip in one. $15 gas or $15 worth of salt... Either my salt is free or my surfing costs nothing.

I will get some RODI water from slappers as I can dilute the sea water as in Rags it is generally around 1.026-1.029 depending on the day. (I think this is kind of movement in salinity is strange ah)

My fish stock has not changed for about 4-5 months. when it was about 10-20 ppm

I have been feeding to much i think.... I also started using coral food again... that always seems to be a problem maker so in the bin it goes..

Cheers

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it may be up that high, but it would be hard to tell between 60 and 80 color would look the same.

Mine was over 50 for about 1 month and i found it hard to tell the correct reading.

i used vodka to bring it done, worked sweet.

I think in that time i only did one water change.

My level is now at 0 (no color on salifert test kit)

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