Are nitrates beneficial?

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naturelover
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Joined: Thu Oct 10, 2024 4:24 pm

Are nitrates beneficial?

Post by naturelover »

I've heard mixed opinions about nitrates in aquariums. Some say they're harmful, others claim they help plants. What's the deal with nitrates in a planted tank with Discus?
Avila
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Joined: Thu Oct 10, 2024 9:16 pm

Re: Are nitrates beneficial?

Post by Avila »

Nitrates are a byproduct of the nitrogen cycle, and while high levels can stress fish, they're essential for plant growth. In a planted Discus tank, aim for 5-10 ppm. Higher than 20 ppm risks fish health, but below 5 ppm, your plants might struggle. Test weekly, adjust water changes accordingly.
tideson
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Joined: Mon Aug 07, 2023 1:58 pm

Re: Are nitrates beneficial?

Post by tideson »

Avila's spot on. I keep my planted Discus tank at 8 ppm nitrates. The key is balance. Too low, and my Amazon Swords start looking sad. Too high, and the Discus get sketchy. I do 30% water changes twice a week to maintain it.
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discups
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Joined: Wed Oct 23, 2024 8:07 am

Re: Are nitrates beneficial?

Post by discups »

Yo, nitrates ain't all bad. Plants gotta eat too, right? My Discus chill at 10 ppm, and the Valisneria's going nuts. Just don't let it spike, or you're gonna have a bad time.
flour
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Joined: Thu Oct 10, 2024 4:27 pm

Re: Are nitrates beneficial?

Post by flour »

tideson wrote: Sat Jun 07, 2025 12:15 am Avila's spot on. I keep my planted Discus tank at 8 ppm nitrates. The key is balance. Too low, and my Amazon Swords start looking sad. Too high, and the Discus get sketchy. I do 30% water changes twice a week to maintain it.
Same here. My Discus are way happier since I started keeping nitrates steady. The plants are thriving too.
shaper
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Joined: Thu Oct 10, 2024 7:00 pm

Re: Are nitrates beneficial?

Post by shaper »

Nitrates are tricky. In my experience, Discus can handle up to 15 ppm if the tank's well-maintained. But if you're lazy with water changes, keep it lower. My tank's at 12 ppm, and everything's golden.
AceDiscus
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Joined: Thu Oct 10, 2024 6:23 pm

Re: Are nitrates beneficial?

Post by AceDiscus »

I've seen nitrates as high as 25 ppm in some setups, but I wouldn't recommend it. Discus are sensitive. Stick to 10 ppm max, and your plants will still get what they need.
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MindArk
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Joined: Thu Oct 10, 2024 2:03 am

Re: Are nitrates beneficial?

Post by MindArk »

It's all about the vibe of your tank. My Discus are cool with 10 ppm, but I've got a ton of floating plants sucking up nitrates. If your tank's bare, you might need to cut it back.
lunaflux
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Joined: Mon May 09, 2022 3:30 am

Re: Are nitrates beneficial?

Post by lunaflux »

I keep mine at 7 ppm. The Discus seem relaxed, and the Java Ferns are growing slowly but steadily. It's a low-tech tank, so I don't push the limits.
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tarnish
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Joined: Thu Oct 10, 2024 4:21 am

Re: Are nitrates beneficial?

Post by tarnish »

discups wrote: Sat Jun 07, 2025 12:56 am Yo, nitrates ain't all bad. Plants gotta eat too, right? My Discus chill at 10 ppm, and the Valisneria's going nuts. Just don't let it spike, or you're gonna have a bad time.
Exactly. It's about finding that sweet spot. My tank's at 9 ppm, and the Discus are coloring up nicely.
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