Thanks for your experience lisa, do you have any pics of yours? How big is it? Do you feed a mixture of meaty foods to your fish? I did that to my old FO setup, fed the fish a mixture and it would drive my snowflake crazy, he'd chase the damsels around the tank trying to get food. I'm worried about feeding time, when I'm only feeding the fish a meaty mixture, the eel maybe go crazy and attack the angel. Also when I feed the eel, I know the passer is going to go after the eels food. I can't restrict the passer to just pellets, especially when I add a trigger and other fish.
I don't have any pics right now, but will try to get some up in the next week or so.
My Brazilian dragon moray is just a little over 2 feet. The zebra moray is a bit over 3.5 feet.
I feed a mixture of meaty foods and other foods. The eels almost exlusively get shrimp, crab, squid, etc. (not fish flesh though). I also feed the other fish flakes of Formula One, Formula Two, Prime Reef, SeaVeggies (algae flakes), spirulina flake, nori soaked in Vita Chem, and enriched mysis.
LukFox has done a perfect job of describing the feeding shuffle. It's not hard, you just have to know your fish and how to make sure everyone gets their fair share and no one gets their face bitten off. If everyone is really hungry, I feed the other fish flakes first, then stuff the eels with shrimp or other meaty foods, then offer some meaty foods to the other fish. My puffers are pretty aggressive feeders, but the other fish are not likely to try to take food from the eels.
My biggest challenge is making sure the zebra moray gets enough. I usually feed daily. If I skip the eels feeding for more than 2-3 days, the BDM starts looking like he is either going to try to leave the tank or take a bite out of the other fish. I have had the BDM for a while, and by keeping it well fed, have avoided any problems.
The BDM is not a particularly aggressive eel, it is just a moderately aggressive (for a moray) feeder. You have to manage its feeding response to avoid problems. I have had a much more aggressive eel, a black edged moray, which is the only animal that has ever scared me. And it was barely two feet long.
For "meaty" foods for the angels, try mysis. The eel may get frenzied, but offer bigger food pieces on a stick at around the same time. I never feed my eels loose food, always from a stick. They have learned that their food comes from the stick. Smaller, loose food for the other fish usually doesn't interest them that much.
HTH. I'll chime in too, and say I'd leave out the undy. There are quite a few other triggers that would do fine with eel. Undys stay relatively small and are perfect for their very own tank.