tetras that stay as a group??
im wanting to get some new tetras that will always stay as a group.....for example i have some pristella tetra and even know that they are settled they still stay close to each other but my neons tend to do there own thing, can you tell me any others that will stay as a group ????
The three species of rummynose will almost always be together. This is one of the tightest shoaling characins. On the down side, they need a larger group (and thus a larger tank than some tetra) to be at their best, since they do like to swim. I have had a group of around 20 in my 5-foot tank for several years now, and they still swim end to end in strict formation quite often. Another point, they need soft slightly acidic water. They are wild caught and will not be as colourful or as long-lived in harder water. Hemigrammus bleheri is the more colourful species and the one most often seen in stores. H. rhodostomus is rarely seen any more, it is not as "brilliant" in the red colouration. Petitella georgiae is also less colourful, but still interesting as it is slightly larger and the tail is a stronger black/white pattern. In our profile of H. bleheri there is a chart showing the differences between these three species.
The species in the rosy clade of Hyphessobrycon also tend to remain close to each other, though these rarely "swim" to the extent of the rummynose but prefer just hovering around under the cover (shade) of plants, and away from any currents from the filter. But they do stay together nicely, and the frequent displaying of males is a beautiful sight.
I got 8 diamond tetras last week, and they stick together like glue. They all swim together and when they aren't swimming, they all hang out on the same corner of the tank. They are so tightly bonded and their diamonds sparkle so brightly that my son has dubbed them "the Cullens" (after those vampires in the Twilight movies). I think they're gorgeous.
Here are a couple of them. http://twitpic.com/8obb63
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