Thanks for any help anyone can offer.
3yo established freshwater, planted tank with two HOB
filters. I have 6 new Sterba Corys and 12 neon tetras in a box that just arrived FedEx overnight. I had planned to put them in my 60G tank with some tetra and rasboras. BUT we had a water main break a couple days ago which seems to have affected the water - after these fish were on their way - and now the water has ammonia showing up in it. I did not put two and two together until after I had seen high ammonia, removed a dead plant, and done three water changes (initial ammonia reading was 4.0, now 1.0).
I have a QT tank but it has a fish in it that is either dying or has fish bladder disease - this also just developed 2 days ago and that fish is alternating between swimming and sitting on the bottom.
So I don't know what to do - do I chance putting the new fish into the main tank and hope for the best (yes, I've done many water changes and have used Prime each time), or ?? I know the neons are especially fragile and I'd waited to add them because this tank has been so stable -
Ammonia 1.0 (was 4.0, so this is progress)
Nitrates 40-ish (normal)