I'm glad I found this thread. I've got 9 in plastic container sitting down on the bottom of my shallow reef tank which is about 17 inches deep by almost five feet long. I have had them together for over 6 months and haven't seen any babies or spawning at all yet. I have been feeding Benepets and ReefRoids misxed kind of thick every week. I think I'll try mysis. They are mostly about an inch in diameter.