Well, for what it's worth, you're really doing very, very well. But, (and, please don't take this the wrong way) I don't think it's reasonable to expect
no more casualties. You've had more success breeding than a lot of us (particularly us newbies
). And, the reason that there are so many fry is that the survival rate for these guys in nature is really low; producing so many babies is how the species overcomes those dismal odds.