If Patrick doesn't see this, you can find the sites by searching under phrases like

"rubber eels"
"caecilian" (the more correct name, which is misunderstood to mean Sicilian)
"T. natans" (the genus/species)

The site is also handy for providing basic clues to sexual differences, so I won't elaborate on them here - merely add to the information provided by the site.

Caecilians as a group are pretty docile, and keeping them in groups is not problematic in any way. The closest they come to "bothering" each other is during feeding time - sometimes one will mistake the tail of another as a worm, which causes the "victim" a simple reflexory jerk, with no damage done to either party. Well-fed caecilians are also docile enough to be maintained in a community tank with no danger to their tankmates. I've kept them with small fish - Cardinals, Neons, White Clouds, Cherry Barbs, Otos, etc. - without losing any of the fish to the eels. They are also calm enough to be kept with normally shy fish like Discus without the Discus even being stirred up enough to notice their passing.

I would recommend feeding them slightly more than the site I mentioned, however, but be prepared to siphon their excrement if you do. Shrimp pellets, beefheart, chicken livers, and other high-protein, low fat meats are good foods. Their natural foods are worms and insects that they come across in their burrowing activities, and I've taken to feeding them earthworms on a regular basis. As I've often mentioned, give a caecilian an earthworm and quite a few of their feeding motions become quickly and logically explained. But take care if your tank is well-planted, as their antics can be rather hard on the nearby vegetation, especially finely-leafed varieties like Cabomba, Water Sprite, or Foxtail.

The site I mentioned states that their feeding regimine consists of a couple of pellets or a fraction of a teaspoon of beefheart every two - three days, but mine get three full-sized earthworms every other day. They would eat quite a bit more if I let them. Giving them a high-protein live diet promotes very healthy growth - I have had specimens grow to over two feet long inside of a year. Not much over, mind you, but certainly better than the 18 inch length and <1 inch thickness of the aforementioned site's specimens. A good live diet also seems to get them in a breeding mood more readily, and the female will develope her young and release them more easily in an environment which they believe supportive.

They shed their outer skin quite frequently, sometimes almost with every feeding (at least with the earthworms). I suspect that this is because of their excellent growth rate on this food. But because of this frequent shedding, it works best to provide them with either good burrowing material or something which will allow them to "rub" or "catch" the skin and aid in its removal. Tanks with a sandy substrate (coarse sand, not fine and densly-packed) work well, but again, their burrowing will uproot any efforts at a planted tank. I have divided the tank, with one end consisting of very fine sand for plants (which the eels can't burrow into) and coarse sand, open areas for them. I have also, in tanks with substrate which they can't burrow into, provided them with little "cave systems" of silicon adhesed lava rock built up into castle with mant chambers and openings. The openings are gapped at and slightly above 1 inch so that they can "squeeze" through the openings and utilize the lava rock for removing the shedding layer. Whether they choose to sleep in the substrate, the "castles" or the plants (or wrapped around the tubing or wiring), they will often do so in communal groups.

Once you've read the web sites, if you have any other questions feel free to post them either here or via e-mail. I could answer mail by personal experience, but the group will provide the opportunity for a wider variety of responses.

FYI -
One type of caecilian that I'm still trying to find a source for is _Scolecomorphus kirkii_, an East African variety with its eyes attached to extendable tentacles near the snout. A very remarkable trait...