discus tank lighting preferences

Chat about all things related to Discus, from purchasing to breeding and everything in between. One of the most beautiful species in the hobby
Post Reply
vivid22
Posts: 3
Joined: Thu Oct 10, 2024 2:06 pm

discus tank lighting preferences

Post by vivid22 »

What's the best lighting setup for a 75 gallon Discus tank? I've got a mix of driftwood and low-light plants like Anubias, but my current LED strip feels too bright. They seem stressed when the lights are on full blast. Should I dim it or switch to a different type?
User avatar
piped
Posts: 7
Joined: Sat Mar 12, 2022 6:40 pm

Re: discus tank lighting preferences

Post by piped »

I've had good luck with adjustable LEDs. Mine are on a timer, starting dim in the morning and ramping up slowly. My fish chill out more when the light isn't sudden. Also, floating plants like Frogbit help diffuse the intensity.
morse
Posts: 3
Joined: Fri Aug 02, 2024 4:22 pm

Re: discus tank lighting preferences

Post by morse »

Yep, too much light freaks 'em out. I run mine at 50% max, 8 hours a day. Tank's got sand substrate, a few Java Ferns, and a sponge filter. They're way less skittish now.
theGorilla
Posts: 5
Joined: Fri Apr 08, 2022 8:42 am

Re: discus tank lighting preferences

Post by theGorilla »

morse wrote: Thu Apr 24, 2025 7:50 am Yep, too much light freaks 'em out. I run mine at 50% max, 8 hours a day. Tank's got sand substrate, a few Java Ferns, and a sponge filter. They're way less skittish now.
Same here. I use a Finnex Planted+ 24/7 but keep it on the low setting. My Discus are in a 55 with CO2 and Amazon swords. They're thriving, no stress bars.
User avatar
tonic
Posts: 6
Joined: Mon Aug 15, 2022 2:35 pm

Re: discus tank lighting preferences

Post by tonic »

Lighting's tricky with these guys. I'd avoid anything above 6500K. My 90 gallon has a Nicrew ClassicLED, set to 6 hours midday. Water's at 84°F, pH 6.8, and they're paired with Cardinals. The key is consistency, no sudden changes.
vivid22
Posts: 3
Joined: Thu Oct 10, 2024 2:06 pm

Re: discus tank lighting preferences

Post by vivid22 »

Thanks for the tips! Gonna try dimming the current light first before swapping anything out. I'll report back.
User avatar
piped
Posts: 7
Joined: Sat Mar 12, 2022 6:40 pm

Re: discus tank lighting preferences

Post by piped »

Good call. Let us know how it goes. Mine took about a week to adjust when I tweaked the settings. Oh, and keep an eye on the plants, they might need a bit more time under light if you cut it too much.
theGorilla
Posts: 5
Joined: Fri Apr 08, 2022 8:42 am

Re: discus tank lighting preferences

Post by theGorilla »

tonic wrote: Thu Apr 24, 2025 10:40 am Lighting's tricky with these guys. I'd avoid anything above 6500K. My 90 gallon has a Nicrew ClassicLED, set to 6 hours midday. Water's at 84°F, pH 6.8, and they're paired with Cardinals. The key is consistency, no sudden changes.
Spot on. I'd add that tannins from the driftwood help too. My fish are way calmer with darker water. Just don't go overboard, or you'll mess with the plants.
morse
Posts: 3
Joined: Fri Aug 02, 2024 4:22 pm

Re: discus tank lighting preferences

Post by morse »

Forgot about tannins! Yeah, my driftwood's been leaching for months. Fish dig the vibe, and the light looks softer through it. No algae issues either, which is a bonus.
Post Reply