Second Cycle Update - Need advise on how to lower my nitrate levels

GoBigGuy

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#1
Hello All,

At the end of March I learned the hard way why you should always put your fish in a QT tank before putting them into your DT. Long story short I ended up pulling everything out of my 90 gal to catch the fish to get rid of the ich they ALL had. Only lost a couple of fish and the rest of them have been ich free for about 5 weeks now.

I figured while I had all the fish out I could redo some of the things in my tank that my brother had setup which I was against, (like crushed coral and base rock). On March 30th I removed all the crushed coral and replaced it will all new live sand, (about 2" to 3" sand bed), and added about 50lbs of "out of the box" live rock.

That's when I learned another lesson the hard way and my already cycled tank started it's second cycle :biggrin:

Added some Dr Tim's One and Only a couple of days after the overhaul but lost a lot of my CUC when all of my water prams went out of control. Week after adding One and Only my pH was at 8, ammonia at 0, nitrite at 0 but my nitrate was 160. Fast forward 4 weeks later and pH is still around 8, ammonia at 0, nitrite at 0 but my nitrate is still high at around 60.

I have a hand full of snails and hermit crabs in the tank as well as my fire shrimp and I feed them every other day with some brine shrimp. Also I've been doing a 15 gal water change about every 1 to 2 weeks.

Does the tank just need more time to settle or is there something I can do to bring down the nitrates?

I'm going to be keeping my fish in QT for another month but would like to get my water prams tuned in by then.

Any advise is grateful!

Thanks
 

Zoarder

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#3
Keep doing water changes more often, also your skimmer might not be doing its job. Bio pellets also help with nitrates. Control feeding and you should be able to lower your nitrates.

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Zoarder

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#4
Also what's your tank size and how many lbs of live rock you have? Btw out of the box life rock have a lot of die off causing nitrates to skyrocket.

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GoBigGuy

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#5
The tank is a 90 gallon SeaClear System II tank with the built in filter.
I just got in this week the SeaClear System 2 Protein skimmer - Venturi that I'm putting in tomorrow.
I have about 75lbs of live rock

I think I answered everyone's questions :)
 

nueok

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#8
When you replaced your sand you most likely killed a lot of bacteria. When they die it will create some nitrates. I would recommend doing few smaller water changes in shorter time. That's typically the easiest way to lower nitrates in tanks.
 

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