Water change vs Nitrate...

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A

ArowannaLover

Feeder Fish
MFK Member
Nov 13, 2011
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Hello MFKs.... I have a 180g tank with full of live stock and plants. I do WC once a week and before I do WC my tank's reading Nitrite and Ammonia are ZERO, Nitrate=40ppm.

My question is how high of the Nitrate can goes before I can do WC without hurting my fish? Thanks for any info.
 
Any more than 40 and you'll have problems. How big of a water change do you do? If I were you, I would do a water change twice a week.
 
@ 40ppm before you are doing a water change in a 180g sounds like your tank is well established. Great job:thumbsup:.

Stay consistent with your weekly chore and you will not hurt your fish.
 
Usually I do 30% WC one a week or every 10 days or so... I want to try to push it to do WC one every two weeks that is why I want to know how high of a Nitrate that my fish can take but I also don't want to exceed the limit. So anything below 80ppm is a safe side right?

I live in San Jose, California. Nitrate in the tap water here contains almost 40ppm. Doesn't matter how many time I test the tap water here I never see it shows below 20ppm. Is there a way that I can get a better source of water for my fish guys?
 
The only thing I can think of right now off my head is pothos. They could help you with both lowering your nitrates and reducing your water changes from once a week to two weeks. Your best bet is anything that can reduce nitrates, I personally wouldn't want my nitrates over 60.


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If possible try it out on smaller cheaper fishes...fishes are usually hardy and can get used to it. However, long term may cause short life span.
 
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