Trouble With Water Conditions

Nichole Bearden

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I am cycled a month and a half, haven't had any trouble until I pulled my carbon out and started using purigen yesterday, my nitrate level skyrocketed went from 5.0 to almost 40. My question is, is this normal and besides water changes what else can I do? The tank is a 20 gallon with a Fluval C2 HOB and an undergravel filter with two 30 gallon air pumps.
 

el337

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Changing chemical filtration shouldn't be the cause of the nitrate increase.

What is your water change schedule like and what's your stock? Have you tested your water source for nitrates? When you said you had 5ppm nitrates, was this tested right before making the switch to purigen?
 

Punkin

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Did you add any fish recently? I am not experienced in stocking, but that seems like a large bioload for a 20 gallon, especially a pleco.
 

el337

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I would still test your water source esp if you noticed the difference after a water change.

Agree that you do have fish with a high bioload.
 
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Nichole Bearden

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I would still test your water source esp if you noticed the difference after a water change.

Agree that you do have fish with a high bioload.
I was told with my filtration system's that I would be ok, I guess I was told wrong I will work on that. Thank you for your time, you have been helpful
 

el337

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If the nitrates are not coming from your water source, I would increase your water changes.
 

Punkin

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You're welcome. Just a note, an HOB filter should have 8-10 times gallon per hour turnover. It may help if you can upgrade to a Fluval C4, or something that has at least 180 gph. It is not a must, just something to consider, it may help.
 
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