Nice stocking! The ropes will definitely appreciate each others' company.
When I had congos and butterflies, my congos primarily ate from the water column, so the butterflies did fine. I'd put the food down a few inches into the tank so they'd swarm there and then the butterflies were left to their surface food. I also got the butterflies used to feeding out of tongs / my fingers so they could get some chunks of the "real" food that tended to sink, like cut up fish. My butterflies ate anything from flake to live - they were really easy.
You may regret posting about your butterfly fish after seeing this long post. Sorry in advance, but I am getting pretty frustrated with trying to feed these guys.
So, the butterfly fish WERE doing really well with coming and getting food from me, especially in the smaller quarantine tank. Now they tend to hover on the back wall and in the back corners of the 120g tank where I cannot get to them because I have the lid sealed down tight to keep the ropefish from escaping. I distract the ctenopomas with food and swoosh the bf food on the surface to them (crickets, pieces of mealworms, mysis shrimp, floating bug bites) and it can be right in front of their face and they just sit there!! I am getting really frustrated and spending a lot of time trying to get them to eat and making sure each one is at least eating a few times a week. The ctenopomas are good at surface eating too so keeping them at bay while waiting for the bf to finally figure out that is food right in front of their face is a real challenge. I tried tongs in the qt, but they shot after it and grabbed the food so fast that I thought they would injure themselves on the metal. They never would eat out of my hand. They run from me when I put my hand anywhere near them........ They need to figure out I am the giver of food, lol.
I am wondering if they are just not settling into the big tank with all the water movement. I have an fx6, fx4, 2 powerheads (on the floor of the tank) and a wavemaker (near the top pointed slightly down) to keep the water column turning and the debris on the floor of the tank moving so it can get caught up in the filter. I have the fluval nozzles pointed slightly down and in a direction to allow some calm water on both sides, especially the right side. And I have a bit of frogbit and floating wisteria that they enjoy lounging in, but that is just getting in my way of getting them to notice the food because it gets in the middle of it while trying to swoosh it to them.
Any advice you can offer would be greatly appreciated!