discus tank water change safety

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Olive
Posts: 27
Joined: Wed Jun 07, 2023 9:12 pm

discus tank water change safety

Post by Olive »

I've been doing weekly 50% water changes for my Discus, but they seem stressed afterward. Tank is 75 gallons, temp at 84°F, with sand substrate and driftwood. Parameters are 0 ammonia, 0 nitrite, 5 nitrate. Using Seachem Prime. Am I doing something wrong?
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Dodge
Posts: 16
Joined: Thu Oct 10, 2024 4:08 am

Re: discus tank water change safety

Post by Dodge »

Yo, 50% might be too much at once for them. Try splitting it into smaller changes, like 25% twice a week. Also, make sure the new water's temp matches exactly. Even a degree off can sketch them out. What's your pH stability like?
oldRash
Posts: 16
Joined: Sat Aug 10, 2024 11:18 am

Re: discus tank water change safety

Post by oldRash »

I've had Discus for years, and they're picky about water changes. How's your flow rate during the change? A strong current can stress them. I use a slow drip method over an hour, keeps 'em chill.
Olive
Posts: 27
Joined: Wed Jun 07, 2023 9:12 pm

Re: discus tank water change safety

Post by Olive »

oldRash wrote: Mon Aug 25, 2025 8:21 am I've had Discus for years, and they're picky about water changes. How's your flow rate during the change? A strong current can stress them. I use a slow drip method over an hour, keeps 'em chill.
Thanks, I'll try the drip method. My flow rate is moderate, but I'll dial it back during changes.
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BoldOne
Posts: 22
Joined: Tue Dec 27, 2022 2:26 pm

Re: discus tank water change safety

Post by BoldOne »

Drip method's solid, but don't forget to check your source water. Chloramine's a sneaky killer. Prime's good, but if your tap's got heavy metals, you might need extra filtration. Also, how often do you vacuum the substrate?
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mossy
Posts: 6
Joined: Sat Aug 24, 2024 2:40 pm

Re: discus tank water change safety

Post by mossy »

I've noticed my Discus prefer dim lighting after water changes. Maybe try reducing the light intensity for a few hours post-change. Also, are you adding any stress coat or just Prime?
Peachfluff
Posts: 12
Joined: Thu Oct 10, 2024 3:44 pm

Re: discus tank water change safety

Post by Peachfluff »

Mine get weird if the new water's too soft. I buffer it with a bit of crushed coral in the filter. What's your GH and KH? Might be worth testing if you haven't.
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Rider
Posts: 16
Joined: Thu Sep 14, 2023 4:25 am

Re: discus tank water change safety

Post by Rider »

Dodge wrote: Mon Aug 25, 2025 6:28 am Yo, 50% might be too much at once for them. Try splitting it into smaller changes, like 25% twice a week. Also, make sure the new water's temp matches exactly. Even a degree off can sketch them out. What's your pH stability like?
Agreed on the temp. I use a digital thermometer to double-check. And yeah, pH swings are brutal. You testing before and after?
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Blaze
Posts: 15
Joined: Fri Apr 26, 2024 10:31 pm

Re: discus tank water change safety

Post by Blaze »

Honestly, I just wing it with mine and they're fine. But I've got a bunch of plants that probably help. Maybe toss in some floaters to soak up nitrates?
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Marksfish
Posts: 19
Joined: Fri Apr 26, 2024 1:26 pm

Re: discus tank water change safety

Post by Marksfish »

Plants are great, but don't rely on 'em to fix everything. How old are your Discus? Juveniles need more frequent changes than adults. And what's your feeding routine? Overfeeding can mess with water quality fast.
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