I would suggest adding blanched brocolli to the diet of both the Regal, (cbui) and the Venustus angel .
You want to blanch/wilt the brocolli on the stove....basically frying it until its bright green and you've weakened the fibers in it. Other methods to use are steaming it for about 10 minutes, just as if you were cooking it for youself, and/or freezing thawing several times before offering it to the fish. Weakening the fibers in the brocolli is the over all goal.
For my Red Sea Regal, I just save a couple of brocolli florets after my wife steams them for dinner, and put 'em in the freezer in a ziploc. When I want to feed the Regal, I microwave a floret for about 30 seconds and attach it to a feeding clip.
I went this route w/ my angel after having it for almost 5 months and watching it get skinnier and skinnier on a diet of mysis, brine shrimp plus, and Rod's food from Rod's Reef. The angel studiously ignored nori, Angel Formula, Formula 1 & 2....
a friend suggested I read a thread on another board regarding Marine Fish and Nutrition, where brocolli was reccomended.
I've had the Regal a year now as of next month, and she's put back on the weight and filled out.
When I first tried the broccoli, the Regal went after it aggressively. A Doliatus Rabbitfish was initially reluctant to go after broccoli and Nori, but after 3 days became just as aggressive as the Regal. At the time, the Regal and the rabbitfish were not in the same tank.
Just another option out there for you guys.
Nick