Reducing phosphate levels

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Duskborn
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Joined: Mon Feb 19, 2024 12:00 pm

Reducing phosphate levels

Post by Duskborn »

My tank's phosphate levels are through the roof, and I'm not sure what's causing it. I've been doing weekly water changes, but it's not helping. Any tips on how to bring it down?
treetop
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Joined: Thu Oct 10, 2024 4:07 pm

Re: Reducing phosphate levels

Post by treetop »

Phosphate spikes can come from overfeeding or decaying organic matter. What's your feeding routine like? Also, check your filter media, it might be trapping excess nutrients.
rockstar2
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Joined: Thu Oct 10, 2024 5:39 pm

Re: Reducing phosphate levels

Post by rockstar2 »

I had the same issue last month. Cut back on feeding and added some fast-growing plants like Hornwort. They suck up phosphate like crazy. Also, check your substrate, detritus can build up there.
seaborn
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Joined: Thu Oct 10, 2024 7:15 pm

Re: Reducing phosphate levels

Post by seaborn »

Phosphate is often linked to overfeeding or low-quality food. What brand are you using? Some cheaper foods have fillers that break down into phosphate. Switching to a higher-quality pellet might help.
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fizzle
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Re: Reducing phosphate levels

Post by fizzle »

Yeah, I agree with the plant idea. Floating plants like Duckweed or Water Sprite are great for nutrient export. Just be careful, they can take over if you're not careful.
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Duskborn
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Joined: Mon Feb 19, 2024 12:00 pm

Re: Reducing phosphate levels

Post by Duskborn »

Thanks for the advice, everyone. I'll try cutting back on feeding and adding some plants. I'll also test my tap water to see if that's the culprit.
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fruitygal
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Re: Reducing phosphate levels

Post by fruitygal »

rockstar2 wrote: Thu Jul 03, 2025 6:44 pm I had the same issue last month. Cut back on feeding and added some fast-growing plants like Hornwort. They suck up phosphate like crazy. Also, check your substrate, detritus can build up there.
Hornwort is a great suggestion. I've also had success with Anacharis. It grows fast and doesn't need much light.
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keyport
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Joined: Thu May 12, 2022 1:41 pm

Re: Reducing phosphate levels

Post by keyport »

If you're gonna use a phosphate remover, make sure to monitor your other params too. Some removers can mess with your pH or hardness.
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finsage
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Joined: Mon Jan 09, 2023 12:12 pm

Re: Reducing phosphate levels

Post by finsage »

Another thing to consider is your water change schedule. If you're only doing small changes, it might not be enough to dilute the phosphate. Try increasing the volume or frequency temporarily.
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duskel
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Joined: Thu Oct 10, 2024 3:18 am

Re: Reducing phosphate levels

Post by duskel »

I've found that reducing light duration can help too. Less light means less algae growth, which can contribute to phosphate buildup.
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