Mine get what all the other fish get NLS spirilina flake and my own home made frozen food.. They seem to do well on it I let algae grow on everything but the front pain of glass maybe they munch on that I haven't seen them do that though..

I took a stone from my severely algae'd Jordanella tank and put it in with the Julidochromis when I first had the transciptus kids and they were on it all the time. if they ate the algae or just the creepy crawlies that must live in it I don't know, but the algae got less on the stone and the transcriptus grew like mushrooms.

Only drawback is of course to watch out that the algae isn't going to go and settle everywhere in their tank as well, as they won't keep it under control (nor do the hordes of Jordanella either in their tank!).

So I put it in the middle of the white sand in the front and removed it when the first long threads went looking for somewhere to attach.