Family member said no power outage that they knew of. Yes to carbon monoxide detector and it didn’t go offDo you have a carbon monoxide detector in the room? Or had a power outage? The fact it killed only the bigger oxygen demand fish but not the coral makes me think it was some transient event. Sorry to hear this happened
I agree, that sounds like O2 depravation.
So I checked my apex. No alarm went off and also checked wattage timeline. No gapsI had a return pump shut off on me in a tank awhile back for 8 hours and lost all my big fish. Could be a oxygen issue
So Eric went over and had to fish out a bunch of dead fish: Achilles tang, purple tang, bi color blenny, starry blenny, 4 anthias, cherub angel, and a cleaner wrasse. A blue star leopard seems to be on its way out…
We can’t figure out what happened, @Srt4eric said my water parameters were fine, no signs of equipment failure, and all my corals were as happy as can be.
Does anyone have an idea? Maybe I should count my blessings as my two clowns, leopard wrasse, and clown goby seem to be fine. I don’t think it’s a disease as Eric said the bodies didn’t show signs of velvet and I saw my fish acting fine the day prior. All my fish are QTed and I haven’t added any new fish recently.
The only thing I added recently were a few sps frags. I also took out a bunch of chaeto before leaving on vacation, changed GFO, and topped off two part and my ato. Eric said the salinity also was 35 ppt.
I took out chaeto and changed GFO about 4 days before leaving. I did rinse GFO, not a ton - just one strain through the media cartridge.How long before you left did you change those things? Did you rinse the GFO? No chance you accidentally added chlorinated water to the top off?
Is your apex monitoring temperature?
No anemone nor anything that could've gotten chopped up into a powerhead? No sea cucumbers or other things that could've died and poisoned things?
Does your camera have recordings?
That's sad and weird. Random ideas there.