I picked up 3 diphruetes one month ago. I think they were part of the second big batch available from BRK.
When I got them home I tried to do a freshwater bath in RODI water, but the bath lasted all of 15 seconds. At the 10 second mark, one of them looked ok, another was tilted sideways at a 45 degree angle, and the third was flat on the bottom. It looked like something was going very wrong and in a panic I dumped them all directly into the tank. So much for acclimation.
They started off being kind of picky at feeding time. I tried pellets, flake, live brine, frozen mysis, and 'mini' freeze-dried krill. The only things they would take were the brine and mysis, and with those they would eat only small pieces, spitting out more than they actually swallowed. I'm still giving them live brine once in awhile, but now they are eating whole frozen mysis and mini krill. I feed once in the morning, once around 5 pm and again at around 7 pm before lights off. They spend a lot of time poking around rocks during the day, sometimes even upside down, looking for food. I'm going to try again with the pellets pretty soon.
One of them lost its 'banner' at about week 1.5. First the 'feathery' part of the banner fell off and it was swimming around with just the boney 'pole'. The pole broke off a couple days later. A new banner is growing in and is about an inch long now (pretty fast regrowth).
They are the only fish in the tank. I haven't seen any bickering between them and they stay pretty close together when they're in the water column. They don't hide in the rocks to sleep but hover close together a few inches from the rock in a low flow part of the tank. Besides rock, all I have is a small colony of pink zoanthids and two nickel-sized palyothas, all of which they ignore.
So far so good with these guys.