Yesterday, I bought 7 Celestial Pearl Danios from the LFS
, and put them in a Quarantine tank that I setup for them.
The tank is a 5 Gallon AquaTop Pisces Tank, and I put a potted plant and a couple decorations in it just for potential hiding places.
The ratio they sold me was 5 Males and 2 Females. It was all that they had.
I had cycled the tank for a week prior using some media from my Main Display Tank. I put a small amount of ammonia in the tank as a test and by the end of the week Ammonia and Nitrites were at 0ppm.
I also drip acclimated the fish for 30 minutes.
I went to bed and they were fine although they are definately good at hiding, but when I woke up in the morning, I found 3 of the males dead.
This left 2 Males and 2 Females, which seemed to sort of pair off, although I know this species doesnt exactly work that way.
Tonight I found another male dead, this time with what appeared to be damage to it's underside.
Could it be that 1 Male killed the other 4? I know they have a pecking order, but they were fine in the store. Maybe the tank is way too small for this particular species with those numbers?
The plan was to eventually put them in my 15 Gallon Flex 15 Aquarium which is heavily planted and already has 8 Scarlet Endlers, 6 Assassin Snails, and over 20 or so Cherry Shrimp.
I checked the water after the last death (and prior as well):
Nitrate: 15ppm (the water is from my main display tank)