Hi, I just started my aquarium a few months ago and everything was going fine until this week. The nitrogen cycle was established pre-fish. Over time I got four platys, one cory, and four glofish. Monday I got five tiny neons and by Wednesday they were all dead. Before I bought them, I tested the water: 0, 0, and 5. That was Monday. Tuesday 2 died. I tested the water: same results. Yesterday the other three died, Tested the water. Same results. Took the dead fish back to the lfs
and they said, "oh, you just added too many fish at once" (five little neons is too many in an established 26 gallon tank?) and then she said when you do that, the ammonia shoots up, but I handed her the water sample and she tested it: 0 ammonia, 0 nitrites, 5 nitrates. So she gave me five replacement neons and said neons "stress themselves out. Sometimes even the ride home is too much." So I brought them home and added aquarium water to the bag a little tiny bit at a time and covered the aquarium glass with a heavy duty black bag and turned out the light and added some anti-stress stuff and now I'm dying to peek, but will restrain myself until tomorrow. All the other fish are fine (so far). Really need to get my quarantine tank off the kitchen counter and set up. Any thought about neons?