Kate, I noticed something in your MBI report that made me come back, wanting to mention something. Did you really use RotiGrow Plus as the greenwater for this larval rearing? Is that what you always do with your clowns? I ask, because RotiGrow Plus isn't designed for use in Greenwater Larviculture applications and several of us, early on, tried it and found it would kill our larvae, somewhat depending on dosage and larval age. While I honestly have to say that based on my own experiences, RotiGrow Plus wouldn't have been a problem until 3-4 days out, if you used it hear as the geenwater, it is certainly possible that it caused issues for you. One other tidbit on all the RotiGrow System Pastes - defrost in the fridge. A slow thaw works better and, I'm now paraphrasing, it prevents clumping of the algal cells from occurring.