My tank has been set up since January with 6 Lemon Tetras. It is very stable now, so I decided to add a few more fish.
I went to the LFS
to get 7 Cardinal Tetras, 1 Albino Bristlenose Pleco, and I got a baby Bolivian Ram because the LFS
couldn't sell him (he only has 1 eye).
Brought them all home and carefully acclimated by floating for 20 minutes followed by removing/adding water from my tank about 250cc for 3 cycles(about an hour total). Then, put them in the tank.
The Ram and Pleco are doing fine. But 4 of my 3 Cardinals died overnight
Tested my water and it was 0 ammonia, 0 Nitrites and 10 Nitrates. The fish store said I should have left the light on longer to help acclimate the fish and keep them alert and my Lemons may have felt threatened by the Cardinals.
So, the LFS
gave me 5 more Cardinals (total: 8) and also gave me 7 Rummy Nose sized Tetras to draw the attention away from the little Cardinals.
Well, 24 hours later, I have less dead fish, but I think 2 more of the Cardinals died. One for sure, but the other one is MIA. They are a little hard to count, but I think I only have 6 now.
All the fish look healthy and they didn't seem to be fighting today. The one fish I found was stuck to the intake tube of the filter. I don't know if he was dead before or after that happened.
So, my question is are Cardinals too small to live peacefully with my other fish? I love their color but can't stand them getting assassinated! My tank is in transition as I want to move to a semi planted tank, but for now, it has just a few fake plants in one corner to provide shelter.
Any Advice would be great either for Cardinals, against Cardinals or for other fish with bright color!
btw, I have a 29 gallon with an AC
70 filter. Total stock at the moment:
6 Cardinal Tetras
6 Lemon Tetras
7 Rummy Nose Tetras
1 Ablino Bristlenose Pleco
1 Bolivian Ram
Sorry for the long post!