You know Bob?
Roti-rich and such works okay as food. DT's is not exactly known as a food for fish larve, but it's good for feeding rotifers and corals and shrimp larvae.
For that matter V8, yes, the stuff you drink, is a very good replacement for DT's, and DT wasn't want you to know that, although at MACNA you'll hear this many times.
I don't think I'll be able to go to MACNA this year
*snif*
For most gobies you'll probably need a chiller; just a heads-up for you, but dottybacks are simple enough with minimal normal equipment. Skip ( Martin ) Moe's book on breeding Orchids is full of info which translates well for the other pseudochromines.
Oh, by the way, here's a weird little thing that you should know, but might not have suspected:
Everybody "knows" that marine fish need super-clean water to spawn, right? Well, the truth is that you'll get a lot more spawns in water that's a bit aged. Clean and with nitrate below 10ppm, but still well-aged and comfortably "lived-in." Any marine fishfarm you visit will look deplorable to you, and you'll wonder how the fish can spawn under such conditions, but looks are decieving. Let that algae grow all it wants to. The "tonics" the algae release seem to make all the difference. I wish I could bottle and sell the stuff.
Anyway, don't go overboard trying to keep everything spotless, because the fish won't spawn as much. That's one of the most common beginner mistakes. The breeders like to see that their fry will have some food available, I guess.