12-09-2009, 11:12 PM
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I've got 15 (6 to 9 to 12 to 15) in a 29 with a crayfish for a tankmate. I tried corys, but they wouldn't have it. They had all 5 corralled inside a decoration as they circled above. A crayfish is the only think they'll tollerate, which they do begrudgingly. I had to put a special tube in the tank, buried at one end, so that the cray can eat in peace. Otherwise, they'll bite at his eyes, antanae and the swimmers under the tail to make him give up his food, despite having been fed already. If I were to drop a full grown guppy in the tank, they'll kill and eat it immediately. Now these are by far the most aggressive tiger barbs I've ever kept, and it goes to show you how temperments can vary. Also, just because it works out in the beginning does not mean it'll still be working several months later, after the fish grow and mature. Just be sure to have a backup plan.