Page 2 of 2
Re: my coral is bleaching, why?
Posted: Fri Aug 01, 2025 12:21 am
by Nellie
koolkid wrote: ↑Thu Jul 31, 2025 9:04 pm
voyen wrote: ↑Thu Jul 31, 2025 8:11 pm
Thanks for the tips, everyone. I'll test alkalinity and calcium today. The bulbs are about 10 months old, so maybe that's part of it. Flow seems good, but I'll double-check.
Cool, let us know what the tests say. Also, if you're gonna replace the bulbs, do it one at a time to avoid shocking the tank.
Exactly. Sudden changes are a no-go. Also, consider reducing the photoperiod by an hour or two while they adjust.
Re: my coral is bleaching, why?
Posted: Fri Aug 01, 2025 1:09 am
by SlateFang
And don't forget to chill with the water changes if you're messing with the bulbs. Too many changes at once can freak everything out.
Re: my coral is bleaching, why?
Posted: Fri Aug 01, 2025 1:51 am
by mikoson
One more thing, what's your magnesium level? Low mag can mess with calcium uptake, even if your calcium levels seem fine. It's all connected.
Re: my coral is bleaching, why?
Posted: Fri Aug 01, 2025 2:59 am
by luxion
True, magnesium's often overlooked. Aim for around 1350 ppm. If it's low, a supplement might help stabilize everything else.