They do love planted tanks, but most breeding tanks are just a bare tank with a spawning mop and they are happy in that too. If you were going to do a killie community tank then it would be best to make it planted, with some fine leaved plants and even some java moss or something, as they will most probably breed (thats if you have males and females) and they prefer mops of moss to do it in. The fry have a higher chance of survival in a planted tank as they have heaps of places to hide from hungry mouths. Bristlenose are good cleaners, along with Corys, and you can pretty much put them in with any other community fish, such as guppys, tetras, pencilfish, rasboras and dwarf cichlids. I have 2 spare female korthausae yellows (which look sorta like guppys lol) in a 350L community tank with guppys, bristlenose, corys, hoplos, kribensis (plus their hundreds of fry) harlequins, golden pencilfish, tetras and a fighter. They are sweet with alot of fish, as long as they arent major fin nippers, and the killies cant fit in their mouths.
If you are really keen to get some killies, id Join the NZKA (NZ killifish association) and you will get some wicked deals on some wicked killies, plus you get other bonuses such as an awesome monthly newsletter, becoming a member of the FNZAS and you can meet up with heaps of killie enthusiasts around the country, and trade eggs and fish. We are hopefully going to be setting up a Website very soon too which will be updated often with fish profiles and info, eggs and fish for sale, upcoming events, helpful links and much much more.