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Quick question
Posted: Fri May 16, 2025 7:33 pm
by staraqua
My Anubias leaves are turning yellow. I've had them for three months in a 20-gallon tank with LED lighting, weekly water changes, and Seachem Flourish. What's going on?
Re: Quick question
Posted: Fri May 16, 2025 8:09 pm
by lunikar
Yellow leaves usually mean nutrient deficiency or too much light. What's your photoperiod? Anubias are low-light plants, so if you're blasting them with LEDs for 10 hours, that's sketchy.
Re: Quick question
Posted: Fri May 16, 2025 8:33 pm
by Torvix
lunikar wrote: ↑Fri May 16, 2025 8:09 pm
Yellow leaves usually mean nutrient deficiency or too much light. What's your photoperiod? Anubias are low-light plants, so if you're blasting them with LEDs for 10 hours, that's sketchy.
Yep, agreed. Also, check your nitrates. If they're above 20 ppm, that could stress the plants. What's your substrate? Anubias hate being buried in sand or gravel.
Re: Quick question
Posted: Fri May 16, 2025 9:22 pm
by staraqua
Thanks for the tips. My photoperiod is 8 hours, and nitrates are around 10 ppm. The Anubias are glued to driftwood, not buried. Should I cut back the lighting?
Re: Quick question
Posted: Fri May 16, 2025 9:39 pm
by lunikar
8 hours is chill for Anubias, but if they're yellowing, try 6 hours for a week. Also, how's your flow? They like gentle water movement, not a torrent from your filter.
Re: Quick question
Posted: Fri May 16, 2025 10:21 pm
by Torvix
lunikar wrote: ↑Fri May 16, 2025 9:39 pm
8 hours is chill for Anubias, but if they're yellowing, try 6 hours for a week. Also, how's your flow? They like gentle water movement, not a torrent from your filter.
Good point. If your filter's too strong, baffle it with a sponge. And double-check your Flourish dosing—sometimes it's not enough iron. You might need a dedicated iron supplement.
Re: Quick question
Posted: Fri May 16, 2025 10:48 pm
by lunikar
Yeah, iron's a big one. If the veins stay green but the rest yellows, that's classic iron deficiency. Grab some Seachem Iron and dose per the bottle.
Re: Quick question
Posted: Fri May 16, 2025 11:27 pm
by Torvix
One last thing—how old are your LED bulbs? If they're over a year old, the spectrum might've shifted, stressing the plants. Cheap fix if that's the case.