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Old 03-31-2005, 03:59 PM   #1
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Ntirite spike length?

Hi All,

Just a quick question about the time I can expect a nitrite spike to last in my tank. I have seen the ammonia spike come and go, ammonia now at 0, but the nitrite seems to be pegged and not moving. It has been over 3.3mg/L for the past 2 weeks.

The tank has been cycling for almost 6 weeks now, and I was hoping the trite readings would have dropped already. An algae bloom has been going for about 2 weeks now aswell, but this doesn't bother me too much...

TIA

Brett
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Old 03-31-2005, 04:32 PM   #2
cJw
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I predict the reply will contain the following text:

"How big's your tank"
and/or
"fishless cycle?"



Wish I could help you more; I'm waiting for my own 'trite spike to end. . . although it's only been about 5 days for me.
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Old 03-31-2005, 05:41 PM   #3
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How long has your ammonia tests been 0? What are your nitrate readings? As cjw asked How did you cycle?
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Old 04-01-2005, 03:58 AM   #4
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Tank is 50 gallons.
Fish used to cycle.
Ammonia been down for about a week and a half.
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Old 04-01-2005, 02:30 PM   #5
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Are you running a UV filter on your tank? I've seen those cause an unending cycle because the appropriate level of nitrite eaters couldn't be built up with the UV running.
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Old 04-01-2005, 02:31 PM   #6
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No UV Filter...

Does this sound long to you aswell?
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Old 04-01-2005, 02:49 PM   #7
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How much live rock is in the system and what other filtration do you have ? Post as many details as you can think of (including brand of test kits and readings over the last 5 days) about your tank. Hopefully something will stand out.
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Old 04-01-2005, 03:05 PM   #8
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OK here we go:

Tank: 50 gallons Juwel Rio
No Live Rock
No skimmer yet
+- 20kg ocean rock
Filters:
Juwel tanks come with a built in in tank filter. These are running pads in my setup
Also an Ehiem ecco 2232 with bio balls and pads return via a spray bar
One Maxijet 1200 ph
Test kits are all TetraTest
Testing for the following:
Ammonia
Nitrites
Nitrates
pH

Also recording SG and temp.

Readings for the past five days:

Ammonia: has been at 0 throughout
Nitrite: Test kit inly goes up to 3.3, the next reading on the test kit is > than 3.3mg/L and it has been like this for 2 weeks
Nitrate has been increasing and at 100 mg/L now
pH: been stable at 8.5 since I started the tank
SG has been stable from the start at 1.024
temp has been between 25 and 26 from the start

Brown algae has been growing for about 2 weeks but taking over the tank...

Hope this is enough info.
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Old 04-01-2005, 03:36 PM   #9
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20kg is roughly 44# so that sounds fine (a hair low, but not dramatically), silicates might be feeding your diatoms 2+w is long, ph at 8.5 is a bit high.

What was your water source? 100mg/l trates is HUGE. I'd do a 30-60% water change with aged SW made from a reputable source of RO/DI. What fish do you have in there (count, size species)? If you have something dainty or not so hardy then do a bunch of smaller (20%) water changes a day or two apart to get your readings back down to reasonable. Maybe your trites are coming back down but it is hard to tell with your tesk kit pegged. I did a 70% water change on a tank with a tang, clown, chromis and cardinals in it and they all made it through ok.

Before doing anything take a sample of your water to the LFS and have them verify your readings. If you're readings are accurate I'd do something dramatic.
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Old 04-01-2005, 03:59 PM   #10
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Thanks for the help.

I am basically waiting for the cycle to complete and will then top up the rock with LR.

Water sources is tap water, but I guess you figured that already!

Fish are quite hardy:

2X Domino Damsels
1 X Electric Blue Damsel
1 X Yellow Tail

I know the fish are agressive, but they are going to go back to the FS that I got them from.

I suppose you are right with the trites coming down but not able to tell becuase of the test kit measurement card. I am going to another LFS to look at skimmers tomorrow, so will take some water over for them to test.

Cheers

Brett
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