Planted Tank Guru
Join Date: Jul 2011
Location: Christiansburg, Va
Let me warn you about Blue Tetras - I just had to have them, too. I love them, they have a unique coloring and are real personalities - but they are nasty mean! If I were to do it all over again, I would keep them in a single species tank - and get plenty. Dozens! lol
I only started with 12 - my first mistake. 5 were killed in the QT tank. (a 29g with plenty of cover). They pick each other off, focusing on the weakest of the shoal. When the QT period was over (one month) I put them in a 125g community tank. This tank has 10 BIG adult Buenos Aires tetras, 18 BIG adult Columbian Tetras (I'm talking 2-1/2", to almost 3" fish) and a small handful of Black Neons and Harlequin Rasboras. The remaining Blues picked on the runt Blue, killing it in a matter of days. That runt tried to hide in the opposite corner of the 6 foot long tank, and yet the other Blues would dash from the far opposite side to nip and drive it. Then the next smallest fish went a week later. They act as a pack, ganging up on one. If I didn't feel so sorry for the victim, it would be interesting to watch how they coordinate. Now I have 4 left. They are all the same size and seem equal. Individually, they take constant pot-shots at all the other fish, causing stress in the tank. You would think a 125g tank would be big enough for all - apparently not. They will make mad rushes across the full length of the tank, pop a random fish, then go back. They steal the food right out of the Columbian and Buenos Aires's mouths, and the Buenos Aires fish are not one to mess with, they are mighty assertive themselves. Just a FYI...