Originally posted by tetra_girl
The species profile section of Aquaria Central is a good place to start your homework.
I would suggest hardy varieties of Tetras (Characins) like Cardinals, Neons, Black Skirts (although Black Skirts can get a little agressive). Avoid sensitive varieties like Rummy Nose Tetras.
Guppies and Platies are also very hardy fish that are easy to start with.
Another note, long finned/fancy finned fish can be sensitive to fin rot/fin nipping etc.
On the home page of Aquaria Central, if you go to the link "Species Profiles" and then "Freshwater" you can browse by species. Each profile outlines the needs of the particular fish (ie minimum tank size, temp, pH, food etc) as well as their temperment and a link to find suitable tank mates. I'm sure you will find it very useful.
HTH,
tetra_girl
Must respectfully disagree. Many of these fish are frequently poor quality, because they are mass bred. Neons are particularly good at going belly up for no adequately explored reason. Guppies and platys are often troublesome in soft warter.
So, Chris2003 - what sort of water do you have? You don't need to go into scientific detail - just how often you have to descale your kettle should do the job - is it basically soft or hard?
If it's soft, then Siamese fighters (Bettas), gouramis and tetras like black widows (black skirts) and bleeding hearts are pretty much beginner proof.
If hard, then guppies and platys are a possibility, but only if the stock is really good - look for really active fish at the shop, and don't buy if any of the fish in the stock tank have clamped fins, or are hanging at the top making swimming motions but going nowhere (called shimmying and usually the livebearer equivalent of the Grim Reaper). I find swordtails hardier than platys but a 10 is too small for the IMHO.
In any water, small danios (zebra or leopard) and white cloud mountain minnows are hardy, cheap and will survive most mistakes you can throw at them. You might get away with a small group of cherry barbs, but avoid any of the larger ones - a 1" tiger barb may seem pretty small but they like a lot of swimming space.
Whatever else you get, a small group of corydoras catfish is always called for - about three in a 10 should be enough to keep them happy without crowding the tank.
Your temptation with your first tank will be to try to have lots of different fish. This will probably be a mistake. A couple of different species + the corys would probably be more than enough.