Crew;1063685 wrote: I'd bet the fish will be fine. The biggest issue will be the pH swing, but even that isn't awful. Id do a big (35-50%) water change today and then 15% for the next few days to bring it back down. Maybe run some carbon too?
Everything should be fine.
I'd start by measuring your pH. If the pH is crazy high (above 9) go out and get a bottle of seltzer water. It will help drop the pH a little bit while you mix water. add and measure pH again. Dont drop the pH too fast as that is just as dangerous.
It's the co2. Dissolved co2 lowers phCamellia;1063708 wrote: Seltzer! Always learning something from you guys!
Such nice people here at this club, so many offers to help out :smlove2: