ropes are a pretty cool fish. one of the best thinsg about them is that they are ick resistant...the theory as to why they are so is that tehy are soooo ancient, that they have become immune to it, but that is just one of many ides on that subject. i kept a rope for 6 months, till he got too big for my tank, and i gave him to a friend for her 55. heres some stuff i noticed:
feeding- likes just about everything, particularly brine shrimp and bloodworms. i dont recommend feeding live food, like guppies, as they tend to become aggressive towards other fish this way. that was told to me by my co-worker.
habitat- they are usually pretty shy, but every so often they'll come out, crusing the water in their fashion. just give him soem rocks and driftwood to hid under or awayf form view and light.
size- they ghet big, meaning very long... so just plan on that when buying them. plus, they are not a fighter type of fish. when you think about it, they are really quite defensel;ess towards other fish, so just keep other fish in there that are of good size, like keyholes, barbs, loaches, not neons, guppies, or even the soldierly platys.
heres some websites that might help you get some info on them:
http://www.elmersaquarium.com/10ropefish.htm
http://www.aquahobby.com/gallery/greed.html
hope this helps! good luck too!